"they might be able to get your master password, but that doesn't mean they gain access to anything"
I can't be the only one who finds that to be small comfort; isn't it sensible to respond, "if my 1Pwd master pwd is stolen, I must treat the vault as if it had been exposed"?
Having access to the 1Passswrd Master Password and your entire encrypted vault still doesn't get the attacker what they need. To decrypt your vault, you also need to know the 128 bit secret key which is also used in the encryption strategy that is stored offline (e.g. on a piece of paper in your safe or via another already authenticated device)
With the current well designed systems, it isn’t the case however. That password is important (one of several factors), but you can’t get access with only that information. It is also something that is easy to change with no retroactive access abilities.