I've had password login enabled for decades on my home server, not even fail2ban. But I do have an "AllowUsers" list with three non-cryptic user names. (None of them are my domain name, but nice try.)

Last month I had 250k failed password attempts. If I had a "weak" password of 6 random letters (I don't), and all 250k had guessed a valid username (only 23 managed that), that would give... uh, one expected success every 70 years?

That sounds risky actually. So don't expose a "root" user with a 6-letter password. Add two more letters and it is 40k years. Or use a strong password and forget about those random attempts.