I don't like guys without shirts, either. For some reason, it just seems wrong on a cyclist, but I don't like shirtless guys under any circumstance, unless it's a bathingsuit. But, it's just me, who doesn't even like male cyclists who wear sleeveless jerseys.
It seems like this season I have seen an increased number of male cyclists wearing what I consider to be strange clothing. They are not wearing "regular" shorts and a T shirt, which I would barely notice, but rather some combination of athletic clothes meant for other sports. It's usually long basketball or running shorts with a sleeveless cotton tank that is completely sweaty. Usually tube socks that reach the knees.
I agree with the OP. Guess I'm kind of strict in my mind about dress codes in all situations, not just court and houses of worship. And for what that's worth, I had to go to court this week, to fight a traffic ticket. I dressed nicely and apparently, I was the only one who thought this was appropriate. And, I still don't like wearing pants to synagogue.