I don't understand those dreams about Mars, Musk failed even with a simple thing like the boring company and settling Mars is so much more complicated than that

I don't understand those dreams about Mars, Musk failed even with a simple thing like the boring company and settling Mars is so much more complicated than that. Musk succeeded in places where the technology was there and all was needed was to refine and market it, spaceX, Tesla and even paypal are all good examples. But digging tunnels, let alone building on Mars, are two problems that don't have any known solutions at the current moment and will not improve dramatically in the near future.