Thanks for the feedback Roman, I tried to edit the article with a section on what you call Growth mindset, to attempt to clarify my position.

You are right that I am very much advocating a growth mindset. But I don't think you can necessarily beat average by having a growth mindset.

My point was that you should not fear things you will never excel at. A growth mindset may lead you to become an average chess player, an average mathematician, average piano player or an average physicist. Just to pick some potentially hard fields to master.

My point is that this is fine. It is better to be an average mathematician than say being a champion at playing Black Jack or excel at YoYo tricks.

As for raising kids, there are so many aspects involved in doing that successfully. I may have succeeded getting my kids to explore and learn a lot by themselves, but failed big time in other areas. Thus I don't presume to be a better than average father at all. I know I have done some thing better, but I also know I have done other things much worse.

But regardless it is useful to share experiences about things you think you succeeded at. Well... also thing you think you failed at. E.g. giving my kids iPad at an early age was one of my biggest mistakes ever. Unfortunately it doesn't seem like I am able to convince anyone of how bad that is until they have made the same bad experiences.