Good points.
Road safety. For the rider, and vehicles is a good reason to be seen.
In addition cycling clothing helps wick perspiration, keep muscles warmer, and if you have ever ridden, protect you with the padding in the bib shorts.
It’s not all about looking like a peacock.... ;) ;) ;)
When I ride, I like to practice what I call being “conspicuously visible.”
Plus, the wicking and not binding up is very important.