Seperating the modern web browser into discrete parts and each doing them well seems to be the only logically answer to me. (If ignoring the task of convincing the general public to do anything in their best interests). We already have dedicated video/music player software on our OSs.

can work on any web browser

Gemini can have competition of browsers: it’s feasible for one person to create a Gemini client completely, correctly and securely.

There are only ~2 web browsers left and making a new one at all is near impossible (forks with minor size changes are great n’ all but not meaningful enough to stop Google basically being in control).