Quite the contrary - tools like these kinds of gamemaker programs, which factor out knowledge -that previously required a huge amount of individual energy expense- into the social domain, make that strong visceral+interactive portion of computer art more likely to be experienced by more people, leading to the greater likelihood of wanting to learn how to go deeper into those experiences teased by the gamemaker programs. The obvious analogy is how the usefulness of view-source in the earlier days of the internet lead more people into pursuing programming than when you needed some sole purpose programing language compiler or interpreter to see the power of computer code in action.

More people being able to do more stuff is just better. Gatekeeping is rubbish.