Just because you’re in public doesn’t mean it’s ok to take secret upskirt photos, film in the gym showers, etc. There actually is a certain level of privacy expected in public.
Edit: corrected SE Asia to East Asia.
There are two sides to privacy laws, and the downside is not often discussed.
The point is to ban widespread normalization of tools that make invasion of privacy easy. You can go find a shirt button spy cam on Aliexpress, but if you get caught wearing it then everyone knows what you’re up to. Wearing one in certain places could be taken as criminal intent.
(I don’t think restrictions like this would work in the US without an amendment, but I think we’re long overdue for a privacy amendment to clarify some things.)
Someone wearing weird 3D printed camera glasses is going to be obvious. Someone with the skill to disassemble a tiny glued together smart glass frame, bypass any hardware protections, and flash a custom OS will be rare, and they’ll get caught anyway when they “accidentally” wander into the women’s locker for the third time.
So yeah, I guess as long as you're okay with a law like that potentially becoming very easy to bypass then I don't have a problem with it. But I think once things start going down that path, most people aren't going to be satisfied with leaving it at that; they'll hear about a bypass and start pushing to restrict the freedoms that enabled it.
I live in "SE Asia" - specifically Vietnam - and I've never heard of such a law. I just looked it up and the two countries that come up are Korea and Japan, neither of which are in SE Asia.
Personally, I gave up years ago. People don't care about actual privacy, they just care about the illusion of it.