I doubt that the porn in the 70s was less bad than the porn today. Legal CSAM was being sold openly so what makes you think that it was more tame than modern stuff?
The fact is that as difficult as it was to get, you got a hold of it and watched it. Why would 'ease of access' make any difference if you didn't have easy access and got it anyway?
Are you implying that perhaps 15-25 mins worth of porn video total throughout all of someone’s teenage years due to such rare access of the material would have a similar emotional and mental impact as having the ability to see that much daily for years as is possible now?
There could have been years between the opportunities we had. I don’t think you conceptualize just how infrequent the opportunity would present itself.
For instance [1]. I am speaking out of experience, as a GenZ person who has been first introduced to the entire world of sex and porn at EIGHT years old. I myself feel it has harmed my brain in ways which I'll likely never fully understand.
The fact is that as difficult as it was to get, you got a hold of it and watched it. Why would 'ease of access' make any difference if you didn't have easy access and got it anyway?