In real life, you don't get better at chopping trees, nor unlock the ability to cut new lumber down. You may get faster and more experienced, but it does not require you to deforest small countries before you are able to break a new type of log. In addition to this idea, you don't craft thousands of swords in order to learn to make them a bit sharper, cook thousands of pies in order to simply learn a new recipe, and mine tunnels large enough to fit every dwarf mentioned in literature in.
Another thing to mention is the lack of ability to be well rounded. As of now I could be a the burliest miner you have ever seen, the best blacksmith in the history of LOTC, and even know how to farm with the best of them; but if I have a dark oak tree in my backyard I need to cut, forget it, I am screwed. I grab my Iron axe and somehow I am physically incapable of holding the axe correctly and end up breaking the damn thing in 4 hits. Meanwhile the lumber I just spent 5 mins cutting down has just vanished now? Suppose I wanted to craft a gate out of it....oh wait I cant, because I only know how to make oak fences, not a slightly darker version of it...
In conclusion, get rid of em, no body needs them, or at least implement something that requires players to actually preform activities involving skill to increase their trait like some kind of mini game, not reward the person with the most free time to sit there and grind.