Depends. Starbucks will be noisy, library won't. There are some shops that exist exactly for the purpose of being a quite place.
If you type loudly, people will give you weird looks. It is annoying. Speaking is much easier to filter out for most people.
Audible conversation is incredibly distracting - we put up with it in the workplace because workers need to collaborate and communicate. There's a reason it's heavily frowned upon in places where people intend to hear something specific (theatres, churches) or focus deeply (libraries).
Your Cherry MX Blue switches probably aren't going to be welcome in any of those spaces either though.
At least multiple conversations happening at once is easy to filter out. A single conversation in relative silence is certainly difficult.
> It's really disrespectful to use a loud / mechanical keyboard in a public place, or really when anyone else is nearby.
It isn't. Public places come with noise. By this snippet, even speaking would be disrespectful in a public place.
> This lets folks use normal/good keyboards and still satisfy the weird craving some have for mechanical noises through their own headphones.
Good keyboards are subjective. It is weirdly reductive to refer to keyboard sounds as a craving.
> Probably will save some RSI surgeries too, people can use healthy low key travel keyboards instead of high travel mechanical switches, while still getting the clicking sound they want.
Low travel keyboards are not healthy. Regular keyboards are not unhealthy. There are not correlations between them. The nature of RSI means that experiences will differ and what works or doesn't work for you will not be the same for me.