Fundamentally I agree with you. Raising people who are mature enough to handle guns as well as other dangerous things in a responsible way would be ideal and would make restrictive laws superfluous. We currently see a similar process regarding cannabis laws in several western nations.
However, since we are far from having these necessary circumstances, more restrictive gun control laws are useful to save lives and prevent psychological damage. Meanwhile sure, go ahead and educate people.

Realistically, I currently don't expect that we will have one day a society where we can trust each and every individual that much. This is why I think such laws will always be nececssary.

Apart from that, I don't see a reason why anyone should posses tools, which are specifically designed to be efficient at killing, for private reasons. I could make an exception for sports. But why would any private person want or need a killing tool?