Not the laughing stock by any means... it's a real common question and your reply is the fairly standard answer for someone that hasn't used them for hunting. You were just the unluck fella to broach the dreaded "SMKs won't work as a hunting bullet".
The regular SMK users are just standing by as they sort of enjoy these regular discussions. Use of these bullet for hunting has made history for several of the longest threads on some hunting boards, a hot topic.
The SMK's I've recovered were virtually indistinguishable from a Sierra GameKing. Very high impact speed and they lose their jacket and/or break up, slower impact and they just suffer some jacket separation on occassion. I have a picture of a 300gr 338 I dug out of a moose I shot at 439 yards with a 338 RUM...not too much digging really as it was on the off-side at the skin.
I've many times set out to recover 175 and 168 SMKs from deer but it seems it's either a simple double-lung, I'm too hurried (crop damage shooting) or the impact site destroys the bullet (SPINE shots). I do have a few more recovered bullets around the house, maybe I can find some and post pictures.