Looking at the OP's lodestone profile, I think I can understand why he won't do large pulls. At least in lvl 60 dungeons, his gear just isn't quite where I'd want mine to be to heal max level stuff (150 weapon, a few other 150-160 pieces, and even a 136). Knowing your limitations is a good thing. It probably could have been a more amicable exchange had the OP explained to the party that his gear isn't quite up to snuff for large pulls yet. I'd imagine most people would be understanding then.