SUBREDDIT: r/AskReddit
TITLE: What non-controversial yet illogical social stigma makes no sense to you?
POST: Obviously, by controversial I mean things like homophobia or racism. This is in regards to less emotionally charged issues.

Mine is stigma against convenient clothing, such as clip-on ties and velcro shoes. I understand that there's a preconception that only children and the handicapped wear velcro shoes due to the fact that they lack either the coordination or the training to tie laces, but why is there such a stigma about it?

There is no logical benefit to wearing laced shoes over velcro. Velcro shoes hold just fine, velcro is easier to fasten and unfasten, never comes untied, and never breaks while you're trying to fasten it.

If you follow the logic back to its root, the biggest reason we wear laced shoes is just to prove to other people that we know how to tie the laces, because they have no other advantages over velcro.
TL;DR: 
Velcro shoes are more logical and sensible than laced shoes, yet there is a stigma against them, so we end up wearing laced shoes just to prove to others that we know how to tie them.