I have met a lot of the people who run those Instagram accounts you spoke about and the ages seem to be 14 to 20. A couple of them do not have licenses. Like many their age they believe super cars rule and everything else trickles down from them. My brother being 17 with no license calls and tells me anytime he sees a "super" car and represents a lot of their follower base.
My point is, nothing is truly real to them as you stated. They have never purchased their own car, never changed oil let alone upgraded anything. Its all virtual and in my opinion a just a different start into this hobby. For the kids who didnt have dads like i did who exposed me to so much, so young they are just getting into it in a different way. Not sure how this will lead the hobby but i dont think its very negative.