And making ourselves completely dependent on those certificate authorities handing out certs. Dystopian, a couple of mega corps deciding who gets a cert and who doesn't.
However, there is the https-only movement to prevent web browsers from viewing my website, because it it not https and therefore not 'safe'.
This movement overlaps pretty well with the people who don't accept other different certificate authorities.
Like i said, nothing is stopping you from doing whatever you want other than the fact that other people might not like it, and might choose to treat your website differently. Just like you can choose not to use https, other people can choose not to like sites that don't use https. Freedom goes both ways.
There is a big difference between "nothing is stopping you from starting an exercise program" and "nothing is stopping you from being the ruler of the planet" even though the construction is the same.
Certificates are particularly painful because it sometimes seems that every program that needs them has its own way to find them. I can't just install in one OS-wide store and say that it should work just like the certificates from the major certificate authorities.
No, I have to install it in Chrome and Firefox. Oh and I've got some Python scripts and some Perl scripts and some PHP scripts that need it, so I've got to put it where they want. And let's not forget curl and wget. And how about thing I'm running in a VM or under Docker? Or database clients.