Those things are in no way comparable. First of all, this is not a transfer of trust from A to B: in both cases (traditional password manager or this thing) yo

Those things are in no way comparable. First of all, this is not a transfer of trust from A to B: in both cases (traditional password manager or this thing) you still need to trust that your own device is not compromised. But with this thing, you _also_ need to trust that the website is not compromised. Secondly, the website is a much juicier attack target than your personal computer.