I personally don't see a problem with semis for hunting at all. I have a goodly number of bolts and levers all capable of taking deer. But I would be nice if I could take one with my AR-10.
But that wouldn't become habit. Like Mrbb said the weight would really be a bother. Why should I carry a 9-10 lb rifle when I can tote a sweet little bolt action that comes in at just around 7 lbs.