> I would say that proper password manager is the best investment you can do from any app.

I agree but I think the point being made is that there are free password managers that do the job just as well. I use keepassxc on the desktop, it has autofill, it's backed up in my Google Drive, I have an Android app that works pretty well too.

I've never really felt a need to pay for a password manager, my current solution works well enough.