The problem is: even us old timers can't deny nor change the fact that operating systems have been putting up barriers to disallow running untrusted code downloaded from the internet.

Try to distribute an installer on Windows that isn't signed with an extensive EV-certificate for instance. It's scare popup galore.

Not to mention the closed gardens of the Apple and Google Stores which even when you get in, you can be kicked out again for absolutely no objective reason (they don't even need to tell you why).

> then we should be honest and build a virtualization abstraction that is actually what we want,

This is not in the interest of Microsoft, Google or Apple. They can't put the open web back into the box (yet, anyway), but they will not support any new attempts to create an open software ecosystem on "their" platforms.