My view on this, regardless of the appropriateness intrinsic to the setting, is based on my own experiences in the political arena: why give anyone ammunition?
If you decide to flaunt convention, it should have a payoff which "pays for" any fallout generated. If you wear sneakers to a very non-sneakerly function, someone WILL use that as an opportunity to call your judgement into question if you are in a profession which purports to reward good judgement.
So unless you are specifically branding yourself as an iconoclast or "that guy" (though even then, caution is advised - denim suits and a comical toupee didn't keep James Traficant out of prison), there's simply no positive ROI to be found in it.
(Even AOC, for example, who positions herself as fairly revolutionary, cuts a very professional figure in her tailored, feminine suits, nice shoes, and perfect hair and makeup... because she knows that a SINGLE misstep, ever, and conservative media would be all over it. Smart.)
To quote mob boss Remo Gaggi from "Casino": "look... why take a chance?"
DH