Not necessarily. 2FA only prevents access to the account, but passwords are both hard to decrypt and easy to change so I'm not too concerned about that. The real valuable data in this hack are the names, emails addresses, DOBs, telephone numbers, and security questions. Those things are very hard to change and would be very valuable data points for anyone trying to steal your identity or social engineer themselves in other accounts of yours.

Yes, you are right. That's really valuable data for anyone impersonating someone. But its becoming more and more difficult which service to use that might protect the information. Hopefully in services like protonmail, everything is encrypted.