I don't know, it seems pretty balanced to me considering one can turn nearly every location into a forest, berries and shrooms o'plenty, and Secret Woods most mysterious secret-- the unexplained daily reappearance of large stumps.
And, I'll give you that. It would definitely be easier never having to water. And I really don't like using up farm space for wild seeds (except leeks for George). The experience definitely isn't spectacular in my opinion. Several days for 2 exp per grown wild seed? You'd have to dedicate a good bit of land (and sprinklers if you don't want to manually water) to make it worth it. Gives you a choice to make.
Oh, well. I think Foraging is good as is.