You can make the same argument for humans.

Clearly not, as meliaesc explains.

Wouldn’t recommend putting your MFA in your password manager. You’d only have one attack entry point.

The point of MFA is that you have multiple, so if one ever gets breached, they still wouldn’t be able to get into your accounts.

Now, if they can get into your password manager, it is over.

Though keepass is a pretty good local one, can recommend.