How else do you think 2FA is meant to work? If you could simply bypass it that defeats the point of 2FA. The question should really be why you would put random gibberish in for your 2FA answers: at the very least they should be systematic responses.
They're either public info, arbitrary, or some combination of the two.
If you answer them honestly you're very vulnerable to account takeover. Many places treat them as a strict override of the password instead of something additional to a password.
The only sensible way to treat them, as a user, is as backup passwords, which ends up making quite little sense.