I genuinely hate to sound patronising and do the "u don't know what it's like" thing but here is the truth;
People with no kids have very little idea what is involved in being a parent to any kid. And not only that. People WITH kids have very little idea what it's like to be a parent to any kid other than their own kids. People usually find out that second one when they get to child #2 thinking they had it all sussed with the first one, and then get the horrible reality check that it's a completely different beast
.
Children, the inconvenient little ****s, are individual human beings. You get to know them and muddle by the best you can, hoping to get them to adulthood with as few issues as possible. Let them experience what's out there (within reason) and be available to put it all in context when they need it.
You can't, and shouldn't, monitor what your children are doing 24/7. Not only is it unrealistic, but that level of control is psychologically a really bad thing for anyone including (maybe even more so) a child.
But yeah, basically, any advice from anyone (whether they have their own kids or not) assuming "all parents should do x/y/z then it would be fine" is being naive and falling into the two major traps of such assumptions.
1) That all children are the same
And
2) That when people have kids they stop having their own **** going on and become a "parentbot" that can or should spend every waking hour eyeballing their children.