I agree, but you've got shareholders looking for the 10% annual growth. You can run an analysis and say "If we just curtail profits only slightly for the time being, we can invest in new sectors that will guarantee explosive future growth", and it's not a guaranteed sell.
There are subsidies to develop tech that Musk has taken full advantage of, and why shouldn't he? I think everyone can agree that both federal and state subsidy systems could use major reform, but they do help drive some developments that keep our businesses globally competitive. But burnable cash always helps, that's a fact.