@blueskiesandforests
My parents gave me an awful lot of freedom in high school in terms of academics. I do appreciate that they gave me a good foundation in life though, I'm grateful for the emotional and practical support they gave me.
I think there were massive differences in the amount of parental support my peers received. A lot of my friends were very mature and competent; they knew what they wanted and how to get it, and their parents mostly stood back, except to give advice. I think that's representative of their whole lives though. If someone is taught to be responsible their whole life, and given the emotional and practical tools they need, then when it comes to it, they know what to do.
But obviously, even the most mature 18 yo needs help and with the amount of competition and all the hoops you have to jump through these days, parental advice is important. Everyone needs someone who's got their back, and who will teach them what they need to know, before they need to know it.
There were people whose parents told them what subjects to pick, told them what uni courses to apply for, and practically wrote their personal statements for them. But those really are few and far between. Mn sometimes makes me wonder at all the helicopter parents out there, but really, the HE forums probably draw them in and are probably about as intense as you're going to get.
To sum up very loosely: Advise, don't supervise