Ehehe, I guess the world is beautiful because it's varied.
My PoV is that an attacker with access to your vault can brute force your master password without you even knowing it. I don't like this, especially for my most critical passwords. I never stored my Google password in any browser/password manager and never will (and in this regard, MemPa is only a way to take a single master password and have distinct passwords for distinct services.)
For the every-day use, to the contrary, I really don't care. Most of the time I have to reset them anyway, for a reason or another.