I can put water in a tanning tub without leatherworking (and add bark and a dried hide and end up with leather).
I can not put water in a barrel without the winemaking skill. This costs 1000lp which is a significant loss to a noob.
Its likely that a noob (later on as the game becomes more and more well known) will come across a barrel before having a use for winemaking...other than filling a barrel with water.
If a barrel can hold water and wine it should also hold milk for transport.
A Wine Barrel should be called Barrel...because it is.
Theres a few minor bugs here.
1. Leather can be created without any skills whatsoever. This is inconsistent with other simple tasks.
2. Wine Barrels are called Wine Barrels even though it can be used to put water inside as well.
3. Wine Barrels should be able to hold milk.
4. Winemaking should not be needed to put liquids in a barrel.