"more often than not" is a vast overstatement, it breaks a tiny handful of sites at best.

They break sites that are broken by design. If a site isn't usable with html and css it's the devs fault. They don't get to dictate my browser's capability or assume I don't have special accessibility needs.

That is flat wrong in my experience. I browse with javascript and CSS both disabled by default, using uMatrix. Only a minority of sites I browse require me to whitelist JS or CSS; maybe 1-in-10. Most newspapers and blogs do not require JS or CSS.