I'm totally not convinced that surfing the internet or watching videos, however aimlessly, is somehow of lesser quality when it comes to relaxing. Especially given that, as you said, many people simply don't appear to have any mental energy left to do anything more "productive" after a workday, never mind a workday AND childcare. Of course, that's again a problem caused by work, not procrastination, but I very much challenge the notion that it's good for you to worry about whether your leisure time is of high enough quality!
Now, I do agree that social media and other things in the digital world can be actually addictive and psychologically harmful, but given the aforementioned state of mental exhaustion I'm totally not surprised that people should get hooked on things that are designed to continuously give your brain small rewards with minimum effort spent on your part.
I also think in many cases people are doing something that is at least a little worthwhile. If they are idly watching a vlogger/streamer/show it's still a social activity. I often watch content that makes me laugh, and I believe this helps me make my real life friends laugh.
Now, I do agree that social media and other things in the digital world can be actually addictive and psychologically harmful, but given the aforementioned state of mental exhaustion I'm totally not surprised that people should get hooked on things that are designed to continuously give your brain small rewards with minimum effort spent on your part.