In some ways, I do think you are right.

If everyone saw the president doing porn I imagine that would impact how people engaged with him politically.

That being said, I do feel like you are treating the symptom and not the source.

Teachers are not using work like porn for freedom of expression, they are doing it to put a roof over their heads. It's meant to supplement income that is not part of their primary source: Teaching.

So long as we pay teachers a poverty level, I don't think we can debate the morality of survival. Or punish them for the inaction of politicians.