Damage tolerance does not make an A-10 shellproof

Would an A-10 be proof against the weapons of World War II aircraft?

It is described as tolerant of 23 mm damage, rather than proof against it.

An A-10 is described as tolerant of 23 mm damage. Surviving some hits does not make it immune to the weapon. That distinction limits the advantage claimed for the aircraft in the World War II fighter hypothetical.