[jjav]

> UBlock Origin is not the only extension that uses the webRequest API that people use.

You are not required to install every extension in the world. Only install the ones you trust.

> Again ad / tracking blocking can still be done with the new API.

As the authors of ad blockers disagree with you, what evidence do you have to support your position?

[charcircuit]

>You are not required to install every extension in the world

Despite that there exist people who install malicious extensions for one reason or another.

>what evidence do you have to support your position?

Go and read the documentation. There is enough capabilities to implement one.