I'm not sure we should label days like this as lazy. When I think back to my childhood, we had days out but they weren't every weekend or too frequent. If I remember my downtime as a kid, it was doing all these things and it was normal.
Playing instruments, drawing, walking the dog, reading, hanging out with friends, baking... But all just what you fancied doing without structured, planned time organised by anyone else.
I think life has become exceedingly busy.
I now have a chronic illness and can't do anywhere near my old level of activity but it does give a particular perspective. I look at what friends fit in and it seems exhausting. No time to just be. Must constantly do.
At least two of my friends struggle with anxiety and may have undiagnosed ADHD or autism or both I think, but they get depressed and anxious if not busy with planned activities and a hectic social calendar but then also end up burnt out.
Phones are society's downfall.. scattered attention span and social media FOMO.