While yes you may have a sealed tire it should be repaired.

It will fail with the screw in there sooner or later, either way the life span the tire will be shortened. Without getting it repaired soon.

And if it was just me... I too would get it fixed cuz I put an unbelievable strain on my tires :-) BUT cuz its Tyler's ride too, so for saftey, I say DO IT NOW, ok.