Nobody said it will not work, seriously? Why don't you look around?
But you're right, some "experts" also claim it makes no sense economically. Probably that's why we're about to see the greatest IPO of all time - everyone's obsessed with investing in stuff that make no economic sense. Especially when the guy in charge has money, but, as you say money doesn't make you an expert.
It doesn't matter that Musk launched more rockets and satellites than the rest of the world combined, that doesn't make him an expert in rockets and satellites. He also built the largest datacenters on earth in time nobody believed possible, but of course he's no expert in datacenters either. You are the expert, without quotation marks.