This is probably a common take by someone with survivor bias though.

Days show porn use and fertility rate negatively correlate. Makes sense from first order effects researchers see on ED rates, etc.

That's lazy reasoning. You can invert the cause and effect and it still makes perfect sense. In fact I'd say that's the more plausible theory. That people experiencing dissatisfaction for whatever reason are more likely to seek it out.

It’s also lazy reasoning to ignore all the self surveys of the youth though, the majority of them are saying it is harmful for their views of the other sex. You can decide not to believe a majority of people if you want, but rationalist assume the data is true.

You just put words in my mouth by inventing that scenario. I responded to what you wrote, not to some hypothetical that you didn't write.

> rationalist assume the data is true.

That is an utterly absurd statement. There is nothing rational about blindly believing any particular piece of data. What you are describing is a religious dogma.

If you want to bring a survey result in to argue that it supports causation in a particular direction then do so by citing it and clearly articulating the connection.