Lol! youre kidding right?
No, I don’t think he’s kidding, and in fact, makes a valid point.
People have a yetzer hora, and do things they shouldn’t, and know they shouldn’t, and would be embarrassed if they were discovered.
When someone intentionally does an aveirah in public, there’s a different dynamic going on. Perhaps the person doesn’t know it’s an aveirah, that would make the comparison of the two inapt. Perhaps they know it’s wrong, but don’t have any busha about doing something wrong. That’s also different than a private aveirah (where perhaps the sinner was caught, but they are embarrassed).
Either way, the comparison between someone dressing publicly in an inappropriate manner to these other aveiros, which might very well be bigger aveiros, isn’t a good one.