I don't know if he was being "snippy" or just didn't care to be chastized publicly for something he wasn't doing.
Personally, I get a little weary of the behavior police myself... however, if someone states clearly that they are doing something blatantly dangerous, I have no problem with asking for clarification, then discussing it.
Anyway... to the OP... single shots are usually nice rifles, fully capable of being great hunting rifles. As everyone else has mentioned, you must be aware of the inability to hunt "barrage" fashion. With practice, a shooter can get off maybe two aimed shots for every three that a bolt gun guy can.. if he has an ejector instead of an extractor.
But, if you make the first shot count, who cares? I've hunted with a Ruger #1 in 7X57 mauser, and loved it. I also have a TC Contender in .22 K-Hornet that is a delight to carry and shoot. I've had a Handi-Rifle in .22 Hornet that was really nice.
On the higher end single shots (Ruger, Browning, etc..) you will usually see MUCH prettier wood.