Home video developed at the speed it did and to the extent it did because of the trade in porn videos.
The Internet revolution owed a lot initially to the sharing and distribution of porn.
It's where there was money to be made because of a demand.
We are now seeing a rise in incel culture which is starting to drive politics which is about a demand for sex. Which is partly down to technological change and the growth in extremism in social media echo chambers but also about sex.
It's partly down to sexual gratification but there are definitely elements associated with power over women. And that's to do with status in society and a sense of loss of control and power in other areas of men's lives.
Part of that is due to toxic masculinity and part of it down to economics.
I don't think it's a single factor, but a combination of a few. It's led by sexual gratification but sexual gratification is a distraction from other world concerns too.
You can not ignore the influence of money and commercialisation (you are a man, you need porn even if you never knew it type advertising), the rise in social media extremism (giving ideas and normalising ideas that people would never otherwise have had) and the loss of jobs in certain industries as the economy changes (a loss of power and status), the rise in politics promoting a toxic masculity agenda (and making promises to men in a certain way to compensate for this loss of power) and a formation of a new idea of what it is to be a man (again social media and toxic masculity politics) in a world where there is a sense of a loss of community on a localised level and where individuals feel disconnected from society for various reasons (in part and in some places particularly driven by austerity and economic hardship).
Sexual gratification isn't just an instinct to reproduce, I do think it need to be seen as escapism from reality too.