Japanese companies manage fine doing this kind of thing.
Japanese keiretsu also usually have a bank at their center or have both horizontal and vertical integrations. Where they don't have integration, they at least have financial integration. Whatever Musk is doing is far less cohesive in every way.
Do they have a gigantic tumor like twitter and Space AI slapped on the side? If all of the products were profitable it would work.
What about Tesla's management style would you call Japanese?
Japanese keiretsu also usually have a bank at their center or have both horizontal and vertical integrations. Where they don't have integration, they at least have financial integration. Whatever Musk is doing is far less cohesive in every way.