That Funko thread was weird. People collect all kinds of stuff. If you don't get it...then you don't get it. I don't get Amiibo, I don't shit on Amiibo collectors. I don't get Vinyl Record collectors, same there. Do yo thang. People are just drawn to certain things.
I mean, I have a friend who collects everything Joker (Batman) related. Any figure, statue, book, comic...that character compels him. My mom collects first edition John Grisham novels also. I'm compelled to collecting Japanese RPGs (and some PC ones). I can't explain it, I like those games naturally, but I'm not even going to play half of them I own. It's a compulsion.
Now I'm getting into Star Wars figures. Some are Funko, others Figuarts, I have some Black Series stuffs, hopefully a Hot Toys soon. So when I see a thread about "I don't get why people collect such and such" I really just read "I don't get people."