I do think your use case is common in family PCs and this is a nice solution for that. The issue is only on non-shared browsers.
The rant, which I agree, is against the trend. Google Chrome recent versions contain poor quality changes which seem to be incorporated only because they support Google end goals.
Most of the times people tolerate bad things if they get good quality products. I support Google Chrome data collection because I get the best browser. If I get bad UX changes (WWW removal), behavior change without UX information (this case) then my patience for the bad things quickly disappears.
For Windows 10 is also going this path. The trend for Windows 10 is bad quality and also dislike the privacy options so I'm moving to Ubuntu.