They can be impressive and there's nothing wrong with being a founder or a CEO (I'm one, too!).

Putting it into one's bio is what makes it... cringe, as the kids say.

It's something pretty standard for funded start-ups because the rest of the ecosystem that they operate in expects it. If it is two guys in an attic it's cringe (see my 'you are not the CEO article') but if you have picked up some funding and employ 20 people I totally get why you would do that.