Instead of being looked down upon, it should be encouraged and practiced since it is of FAR more value in BG hunting than sitting on one's ass at a bench and squeezing irrelevant 3 shot groups.
Sitting at a bench shooting targets is NOT hunting practice.
You'd better find accurate loads for hunting AND get your scope sighted FROM A BENCH -- ( if you want confidence to kill humanely at any distance ) but NONE of that is ' hunting ' practice.
Practice from field positions includes ' off hand ' shooting. I'd rather not have to shoot off hand but when hunting, sometimes off hand is the only opportunity you have.
Jerry