We're talking the H here, not the C. The C isn't a super tank-killing demon. The H is. If this plane were so damn hot, it wouldn't have been dumped at the first chance of ANY other variant. It wouldn't have had the cannon removed and 50cals stuck in the gaping hole it left.
Sure, it's being used a-historically, but HISTORICALLY they knew the potential of it, and they HISTORICALLY had need of tank killing machines all over Europe and non-PTO theaters. If it were this potent, historically, it would have been the only ground attack platform used against axis armor.
Instead, it was not. They knew what it could do, they decided to stop producing it. There's a link between the two.
EDIT: Rather than say "prove it's wrong" I ask you: Prove it's RIGHT! Prove to me that a plane without armor piercing shells not hitting at 90 degrees (often 45 degrees based on angle of attack run) is going to penetrate hardened steel targets at the worst angle possible to hit them, and kill some of the best tanks in the war with 1 hit. Prove it's RIGHT, the way it is.