Musk's wealth doesn't come from "being born into money" - it comes from being an entrepreneur. Recently there is hate at Musk for political/ideological reasons. Now people just lie and make stuff up without regard for the truth - I find it sickening.
Musk was advantaged by having parents who raised him, provided for his education, and invested in his early company. He had more advantages from birth than most people in the world, but if you compare him to the average Stanford grad student (where he dropped out) I'm not certain he's in the top decile in terms of advantage. On the other hand, in terms of outcome, Musk is clearly an extreme outlier - pretending like Musk-outcomes are determined by his parents or family money is pure cope.