I agree, and when I first read the headline, my reaction was "Well, I guess it's time to start researching different password managers, because I obviously can't use Bitwarden anymore."
However, despite what the headline says, this 2FA does not appear to be mandatory.
Under the heading: "Who is excluded from this account email-based new device verification?"
> Users who opt-out from their account settings, to which an option will be added, are excluded.