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Compliance with MIT/X11 license just requires distributing the license file with the binary. If you infringe, it is trivial and costless to correct.

Copyleft licenses are more troublesome for those who would rather not release source code. GPL is being used as a stand-in for all copyleft licenses.

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It is not costless to correct if you don't know who's code was an input in the first place.

It's intractable to preemptively avoid all possible copyright claims, but correcting them after being called out on it only requires adding the license and attribution required by whoever's currently suing you.

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