Yeah, "should", as in "Apple should invest millions of dollars in a product that (almost) nobody uses or cares about". Tweeting is easy, isn't it?
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