Well firstly for the record I was never arguing that people can't spend their free time however they want - I believe I said "each to their own" and earlier mentioned that it wasn't something I would do myself and don't really understand it, but that's not exactly judgement or telling people what they can and can't do...
As for the superior thing I'm sorry to say that that really is just the way the world is now over virtually everything... Obviously it is a generalisation but everything is marketed on the FOMO factor stoked super hard by social media these days - just look around at the launch of anything and you'll see it. How about those 30XX series cards lately to pick even just one topical example?
Fair enough on the first point, I'm of a similar mind of live and let live.
As for the second, I don't really agree with you, although I admit I don't take part in social media (unless you count forums such as these) and neither myself or those I'm friends with fit the mold you're describing. I genuinely don't care what others think about what I choose to do in my free time. For the record, I probably wouldn't pointedly advertise the fact I'd just bought a new graphics card and spam pictures of it all over the internet either.

Most of the people I interact with don't act that way either, but if you spend any time anywhere more "general" / "common"(?) online (e.g reddit or twitter) it's all you see all the time, about everything (regardless of how inconsequential). It's sad to see that for so many people now what other people think really is more important than anything else - look at the scores of people who will pay £100+ to go to concert and then spend the whole time holding their smartphone taking selfies or recording clips of the show; because what's the point of going if your followers and friends don't know about every detail?
) , I can also understand why some people take off time to sit on beaches and do nothing (though it doesnt appeal to me)..I can even understand why some people take off time to do nothing but sit on the sofa and chill. I guess the point is, I can understand why people would take off time from work to do whatever, I might not do it myself to do activity X or Y, if those activities have no appeal to me but I can understand why someone would do so if it was meaningful to them.