I agree with the sentiment. But in order to build something that lower the barrier to entry you need an incentive. Building tools is hard and costly. Maintaining them even more.

In video games you have blueprint systems because the economy supports this idea. For kids you have scratch.

For web dev you have some solutions but my guess is that when someone wants to use node there isn't yet any useful solution (outside of playgrounds) that is cheap enough to make and remove the need for some basic computer knowledge.