Even if he doesn't have any disabilities, what is the point in making fun of him? It's not like he is claiming he has a unique or record breaking collection.
I don't have any sort of disability, and I collect regular old "worthless" base cards. Why? Partially because I enjoy TTM, but mainly because I get enjoyment out of the cards. Sure, they might not have any resale value, but owning them gives me enjoyment so I keep them. If you don't enjoy the same thing then don't collect base cards, but there is no need to be an internet tough guy because you have more value in your collection. I'm sure there are people with collections worth more than 99% of the people on here, but they don't laugh at all of your #/5 cards because they aren't superfractors.