Why is it against the interests of large tech companies? I get Apple, but Google is always pretty eager about the advancement of the web platform, see Chrome and Chrome OS.
Microsoft was once super scared of Java because it could have filled the role that WASM and desktop browser apps now try to break into. Microsoft tried EEE, but Sun bit back.
Google is happy with most anything you do on the internet, as long as you do it in Chrome so they can watch.
I’d say it’s more about Google search being the front door of the internet to most people, so while internet usage is high so is Googles revenue.