Funnybone- i don’t think he’s trying to upend the system or complain about the way it’s been set up, he’s just commenting that there are people who are not comfortable with it. I have heard that many times and judging by the increase in people willing to paying extra to use private mikvahs there must be a demand of some kind.
As far as modesty, i don’t think is always about that. Even if you are comfortable changing in a locker room, that isn’t the same as finding your rebbe among you or your menahel. And aren’t there halachos about seeing your father without clothing?
There is also a cleanliness issue, not all of us are used to sharing or recycling bath water like they did a century ago.
Regarding safety…I’ll leave that one alone.