Telling people to "just use Linux" hasn't broken the OS duopoly. It doesn't matter that I get better fps gaming on Linux, or that I don't get ads baked into the OS itself.
Telling people to "just use Signal" hasn't broken Facebook's chokehold on messaging. It doesn't matter that using Signal is *exactly* as difficult as using WhatsApp, for fuck's sake, WhatsApp uses Signal libraries internally!
Many people actively prefer the corporate tech they see in as, that aligns with corporate power.