And anyway, I reject this prudish Judeo-Christian inspired sexual ethics. Sex is good and good for you. There should be more of.
Short- / medium- / long-term non-monogamous jollies goes as far back as time immemorial. As far back as the beginnings of life itself. I'm willing to bet monogamy is the new normal as far as historical longevity is concerned. I'm no anthropologist, so I'm willing to be corrected on that matter.
Also, I'd argue consumerism isn't exactly new either. People have been blowing their pay packets at their local pub since the invention of the local pub.
What I'm disagreeing with is this: new doctrines of consumerism that is <snip> making us all willing to use each other (apparently) for our short-term jollies.
It isn't the new doctrines of consumerism that are making us do this, it's human nature; we like to fuck.
So your argument ... isn't one.
There are religions outside the Judeo-Islamic world with similar views. Besides, such mores also have a lot to do with culture and class.
Is a lifestyle pushed by people who are immediately family inherently a good thing?
A relationship without doubt is a good thing but it isn’t the only thing. Modern society for shallow moral reasons conflates committed relationships with sex.
This causes a lot of problems and probably is one of the main reasons why relationships break up or people feel miserable in relationships.
Is hookup necessarily (or even mostly) non-consensual? I'm probably missing some cultural context, what's the distinction you're making?
Having consensual, casual sex with someone on the other hand shouldn't ever be considered questionable, given that you're being honest with everyone involved, which might include someone you're in a committed relationship with at the time.
So, doing something consensually never is a bad thing. Lying is, to others as well as to yourself.
Why on Earth would you conflate hookups and rape? Please stop.