Ask yourself, wouldn't you fly a plane into a tower if that was the only way to disable Skynet?

Yes. I would also drop a nuke on New York if it were the only way to prevent global nuclear war. These are both extremely unlikely scenarios.

It's very correct to be suspicious of claims that the stakes are that high, given that irrational memes have a habit of postulating such high stakes. However, assuming thereby that the stakes never could actually be that high, regardless of the evidence, is another way of shooting yourself in the foot.