Do you have proof nobody uses it? Quick Google search shows that it has slightly under 20% market share: https://gs.statcounter.com/browser-market-share
Which is still a decent chunk, but if it didn't have the same preinstalled advantage or OS/hardware optimizations it enjoys on MacOS it's hard to imagine that number would change much.
One could say the same about edge. And google’s practice of shoving “install chrome” notifications and pop ups down your throat at every opportunity when on a google website or app