I don't know if the balance of evidence supports significant changes in sexuality and eroticism or not, but I think the way you've made the case that it doesn't here is unconvincing. Consumption of erotic content on the internet and actually engaging in sexuality as a participant are drastically different matters and both the sign and magnitude of any correlation between them is hard to pin down. From my own anecdotal perspective, there's a weak but significant anticorrelation between how much porn/erotica people consume on the internet and how much they engage in sex or kink or even relationships with other people. Maybe the sample of people I've met isn't indicative, but I would say neither is anything you're using as supporting evidence here