With the help of the OTP, if enabled, it will reduce the number of hacked account cases, as it won’t be easy for anyone to have access to your OTP app unless they hold your device.
The 2FA is an additional layer of protection but if you are careful enough with your username and password and not tricked to enter it into another Bitcointalk-like website which will reveal your password to the hackers, that should be enough with the staked bitcoin address. Since the 2FA was implemented on this forum, I have not gone for it. I use a strong password. It is truly an additional layer of protection though.
To add to what @Bitmaz said, it was added last year December because of accounts hack, and last year a forum member said someone login to his forum account and use his account to take a loan without his knowledge.
A thread was created to seek from forum members opinion on 2FA security which most posters accepted. I believe that there will be less hacks on accounts with active 2FA.
I do not agree with this because it has been long since people have been asking for 2FA on this forum but members will say stron password, not enter your password and username into Bitcointalk-like website and email account protection with signing of bitcoin message is enough until PowerGlove proposed it and theymos allowed it. If PowerGlove did not proposed it, it is possible that we may still not have 2FA enabled for login on this forum.