You make no sense and use no logic. You continue to repeat the same nonsensical bull over and over, ad naseum. You are wrong. If all stats were separate bars, had their own costs, and there was no balancing to do, then a piece of food in a cupboard is nothing but a potential stat or progress towards one. There is no benefit to leaving it in the cupboard unless you plan to give it away or trade it, in which case you will do so. It doesn't matter if that stat isn't the most useful to them, because it doesn't hurt them in any way, it doesn't make anything else harder. They can chow down a whole cupboard of dex food and still go right back to their strength food to make them a better smith. They can decide to eat all those piros they had sitting around, gain a bunch of dex and con, and go right back to mass cooking cavebulbs for psy. There is no drawback. As you said yourself, the fact that a future patch could change things means it's better to have them than not have them, and if there's no drawback to having them, then they're damn well going to have them.
I don't know if perhaps you're just new, or you don't play very often, or what, but food is very, very easy to get. A village member of mine went from making q60ish jewlery to making q250 jewelry in the span of a week by trading for cavebulbs and collecting some himself. We're talking several hundred cavebulbs. Normal foods are even easier. You can claim whatever you like about the current system, but there is absolutely no thought in your idea. You claim all people have to do now is collect various foods, but that's still more than they'd have to do with your dumbed down FEP system, which is collect the same food in mass numbers, something that isn't difficult. A 10x10 of wheat, a 5x5 or so of carrots, onions, grapes for raisins, poppies, and pumpkins, and you can grow your way to massive numbers of everything but psy and int through the use of baked goods. It wouldn't be hard, and could be done in high enough quantity to trivialize their stats entirely. With a 10x10 field of wheat, such as the one I actively harvest, you bring in 200 seeds to use for doughs every harvest. Couple this with the various ingredients for baked goods such as carrot cakes, piros, raisin cakes, Rings of Brodgar, and Pumpkin Pies, and all but a few stats are covered. They may not be the best foods with the best FEPs, but they're high on the list and readily available in high quantities. All you'd have to do is farm.
I have nothing wrong, as I and the others have said, with you wanting a more fun system. We just want you to make it more interesting through expansion and ideas that aren't just "make it easier, I don't like that you have to think about it". There is no denying that what you are asking is a simplification. The one thing that makes FEP unique is that all of the stats are tied to the same bar, and there is a random factor. My idea up top that has not even been commented on is an example of a way to make for more specialization, and to allow mixed foods, and mixing food types, to be even more popular and even more rewarding. I don't know if the idea overall is good, but it's a way to make the system more unique, more fun, and more complex.
Further, I think you're looking at this far too strictly if you really think people always sit there keeping every stat perfectly equal. Diversity, particularly at higher stat maxes renders differences of 10-20 points meaningless. With a max stat of 200, each unique food eaten lowers the requirement by 8.9 FEPs. That means even eating two different foods makes the difference between a stat of 200 and a stat of 182 fairly irrelevant. Yes that difference could be used to raise the stats a bit easier, but that's what we call min/maxing, and it's not something you have to take part in. The world is not going to end if you keep your stats up to snuff. It's perfectly fine to have gaps, so long as they're not incredibly extreme, like all your examples have been. I could see a problem if you had 800 strength and only 10 agility, but it's much more likely you're going to have 200 strength and 120 agility. In the end, no matter what the stats, every point raised is only 1 more FEP to gain.
In the end, I think it all goes back to a miscommunication when it comes to specialization. Specialization doesn't mean you abandon all stats in favor of one or two that help you. Things like agility, constitution, and cha to an extent are useful to everyone, and in the future I would expect that all stats would have some overall benefits attached to them which everyone will want in some quantities. A specialist is much more likely to have say, 40 con and 40 agility, with 100 dex and 50 psy, than 200 dex, 100 psy, and 10 con and 10 agi. Specialization means you focus on one area above others, but not necessarily only on that other area.