Says who? Animation is a few seconds, you say "all the way across whitegate" like its so huge, any camp zone is far far larger than WG. Your trying to prove a point by making it seem like its such a task to goto the AH.
Here, I can prove a point too like this:
Mage goes to cast snk/inv on self, cant find correct macro for a moment... accidently casts inv first...cancells cast...casts snk...casts inv...runs past a few mobs...snk begins to wear...mage searchs for a safe spot to recast...mage cancel snk icon...mage casts snk again....mage pasts the rest of the mobs....mage casts snk/inv on idiot melee...casts snk/inv on self....both pass a few mobs.. melee:<snk wearing help help>... melee trapped in a corner...mage backtracks to melee...casts spells on him again...casts spells on self.....both travel towards camp again all the way across zone...melee finds out he also forgot tools...melee<oh shit I need to goto AH...can i get a snk?>. Absolutely stupid and there is always a chance someone will get agro and kill self or multiple people.
See, this way sounds long too if you argue with words and not facts. It is possible that going back and casting spells would be faster but its a more variable condition and more human error can happen then just taking your sorry forgetful ass to the AH.