Yeah, I dont like volume goals because my standard of play really slips if I try to force hands when I'm not in the right headspace to play.
this is fine and of course you should never play when you're in the wrong place, but if you can't play enough to realistically make 10k within time X, the $ goal gives you the same problem.

Depends a lot on your poker goals as well - I want to quit my other job (and then make enough so wife can to!!), so one of my challenges is being in the right head space as often as possible. If you're just wanting it to be a profitable hobby maybe a volume goal isn't right, but I really think the idea that you can be a long term winning "hobby-ist" is a myth. It will work out for a few people just due to sample size and good BR mgmt, but I think almost all profitable players are playing a lot when it's more work than fun. It's maybe/hopefully better than your other job, but it's not necessarily what you want to be doing right that second. I'm not a NLHE cash expert obv, but I can state for sure that this is/was true for me in SNGs, MTTs and PLO cash.