I mean it’s literally the way the rules intend it. Most just get confused by the character sheet showing the most common ones.

I’m playing for 5 years with my group now and still get some confused looks when I ask for e.g. a Charisma (Investigation) check.

It simply says they can use the feature that often. It never says that it’s an at-will action/feature. “At-will” isn’t even a game term in 5e as far as I’m aware.

Possibly the most ignored sentence in the PHB, even by Wotc themselves:

Their skin tones cover the full range of human coloration, but also include various shades of red.