It is always a must to enable 2FA with anything that has connection with cryptocurrency holdings. Even the trusted platforms were cloned and the users were scammed taking the personal credentials along with the security key. So, 2FA is the only way through which security can be made effective.
Of course, 2FA is very important to protect from hackers, but if you look at the matter, it is clear that the problems, in that case, did not happen due to his security reason. He is claiming that his balance has disappeared, but no one has hacked him, but the stake team themselves have compromised the accounts of those users, because he may have broken some rules or been guilty of controlling multiple accounts. Since the Stake support team has taken cognizance of the matter, it is hoped that the matter will be clarified soon.