There are scientific studies which show that parents are overall less happy than adults without kids.
Of course parents still do a lot of stuff but it's because most of the time it's even more stressful to stay at home with the kids. And as you noticed it's stuff mainly for the kids. Of course some things parents can enjoy as well. But the main thing about being a parent is that you can't just do what YOU what, especially not spontaneously.
And the post was about vibe and chill, which is definitely something parents do a lot less than they would like to.