There aren't that many entrepreneurs who failed multiple times before succeeding at a business. If you look at the big businesses that dominate the US tech economy, they're all first time founders (Amazon, Apple, Google, Microsoft etc).
There are also very few entrepreneurs bootstrapping their own business. Even rich kids go to VC, they aren't usually risking their own funds.
Finally, if you try multiple times, learn something important from each failure, and then succeed, it seems reasonable to claim that this is now due to the skills you developed and not mere luck. You can't even claim it's privilege - it might be, but as this article argues, being an entrepreneur isn't being handed a nice life on a plate even if you're successful.
For sure there are counter-examples where some rich kid spent their parents money trying and failing over and over, then got lucky without learning anything, somehow had an incredibly easy life from that point on and then started talking about merit. But they're going to be the exceptions that prove the rule. The carnival analogy therefore feels like ideologically motivated reasoning of the most common Marxist kind (claiming hard work and risk taking don't matter, that all success in life is the inherited privilege of capital).