As title says, characters that are being developed by raising so called crafting attributes, e.g. perception, dexterity, psyche and will, and skills like sewing, carpentry, lore, farming, etc., (but not limited with them) are lacking gameplay after they reach certain point of development. Once stats reach level of 400, you will hardly ever face any activity requiring more stats, making it pointless to collect more LP and eat food. There is no industry in which you can get profits by continuation of character development, as game only has softcapping mechanics.
As a comparison, miners are able to raise their strength and masonry to much higher values, allowing longer gameplay and character development.
PvE characters will always find a reason to get more fighting stats, for soloing dungeons and killing endgame creatures.
Not to mention PvP characters who are in constant race for stats.
By creating this topic I really would like to avoid devs making higher requirements for gilding and gem cutting as a solution, but to find some other reason that will create a need of raising stats above that values to get high-end results.