it is all business in the end and that is the reason why you should never waste your time on social media if you are not earning from it or at least using it to market something or use it to do something that gets you paid. in a digital age like ours, everyone ought to have the ability to also benefit from these platforms and not just register with them just to make the numbers.
You're right joining those above mentioned platform when you have no business to advertise there is just like a waste of data, though most people will not see it that way. probably just for fun and entertainment by watching those facebook reels, without knowing that those people who are creating those reels get paid when people keep watching their reels.
is obvious that is only those people who are very lazy that can devote their time in watching those reels, reason been that they don't have important things to do with thier time. so they will decide to visit any of this social media platforms just to spend the whole time and data to promote other people, without knowing that the shortest time in life is due to make it honourable. most of those content creators we see today does not have a job, but instead of them staying idle without doing anything. they decide to come up with the idea of becoming a content creators, because they wouldn't want to waste thier time in doing nothing.