Can the candy be uneaten?

Better than it can be later? Recall the "can you watch the candy" impulse experiment we learned about in Psych 101 the one that correlated smarter kids in later life with being able to resist eating a candy for longer than some other kids in same third grade class. Does impulse control explain this though, and why is it supposedly untaught? Why do smarter kids start out by trusting their future more than more impulsive kids who later tested lower on basic iq skills? What is behind basic trust and what is it made of? How do the actual basic fears differ between kids who can or cant wait a bit longer for rewards? Do they even look the same the kinds of fears impulsive vs less impulsive displayed? Is there any way a kid can be taught the correct "impulses" for better grades etc??? Is this something we even want and if not why not? Why does this whole issue end up feeling pretty unbalanced abd shall we say ...unfair??? Why it it so easy to hurt some kids earlier in life than others by noticing they might not rise too far and then not providing more impulse training and appropriate education? Is education in 2024 just another relic of a system that showed our own shortcomings but we were too neutered as a society to care?