I'm not sure what the problem is as it forces you to create a stronger password.
I guess the problem is remembering the password.
The amount of people that get their accounts hacked on gambling sites could have it prevented if they used a strong password.
It's the trade-off between a strong password, and being able to remember it. The harder the password, the more chance people use the same password on different sites.
The obvious solution: a password manager. My typical password is something like TAIF Cop]k~)T7O'mL}2P"Ka-[NG{_mF]:r&?.
A user who's account gets compromised because of a bad password is likely to blame the site.