I agree, but I do cue from the audience. And the norms change with the times. These days, household name acts tour football stadiums wearing t-shirts and jeans. In the 80s, every hair band was pretty much in drag. It affects the shoe choices!I am of the (perhaps not widely shared) opinion that band members should look and dress like they are in a band, so there are some at least subtle visual cues that they are not part of the audience.
We play in a few hot, sweaty bars where people are there for the music but are very casual. I wear jeans and a t-shirt to those gigs, with Adidas sneakers, because that context feels right in those clubs.
We also play in a couple suburban bars (cougar bars, honestly). The clientele there is older and somewhat more dressed out. I do the same, usually a nicer pair of jeans with a button-up shirt and a pair of comfortable black dressy shoes.

