It sounds like you want separate profiles, not containers. The point of containers is that all the settings and addons and saved passwords are still there. If you don't want that, you can create a second profile with different settings and a different set of addons, etc.
Yes, that's what I use (and what I have used before containers). I have simply assumed that containers are - supposedly - a take on modernizing profiles and making them convenient to use.
TBH, those days I tend to use separate browsers, because profile management is significantly less convenient than just running a different program.
