To be fair, no one really uses NSFW as a term outside porn context, despite it being able to describe much more. Nonetheless, every game has its place and itch.io was open for those. If you didn't like it, instead of cheering devs can't be paid now, you can move to site like Gamejolt which is exclusively anti-nsfw and you can play the games without that content freely, it's also one of the biggest hosts of fnaf fangames.
Viewing post in Itch.io getting rid of NSFW games is amazing
First of all, NSFW is not necessarily porn, it includes erotica, which is super broad! And the tag should include violence, but that aspect seems to be forgotten more often than not.
I get you a bit, I wouldn't mind personally if pornographic content was missing from this site, BUT banning it on principle is all kinds of wrong...and the very point of Itch is the creative freedom it provides.
Also, the other commenters are making this point you keep ignoring: you and anyone else who doesn't like NSFW games have a multitude of options. Zillions. We, on the other hand, only have Itch. :v (Do let me know if I'm being ignorant, but I'm not familiar with any alternatives)