not sure if you mean clip-on cell phone wallets (I assume that people that don't want a thick cell phone don't add a wallet since it makes their cell phone too thick), or actual wallets... plenty of people complain about those:

https://lifehacker.com/how-can-i-downsize-my-ridiculously-la... https://veryexcellenthabits.com/downsize-ridiculously-enormo... https://www.reddit.com/r/onebag/comments/5blfkt/my_wallet_is...

And a thick wallet causes enough health problems for it to be called "Fat Wallet Syndrome".

https://en.wikipedia.org/w/index.php?title=Fat_Wallet_Syndro...