Red card is a different issue, only few managers can take advantage of that. I'm not good at taking my chances against a team with red card too.
And I hope we are still talking about facing weak opponents. I used that tactics and haven't lost to a weak team (like 20% lower) in 3 seasons. They are only hard to break down when you attack and push many players forward. You have to defend and let some space upfront to attack.
I'm by no means saying attacking them won't work sometimes. Defending and creating room to attack is just a better option to me.