"Tesla only exists through government largesse, specifically carbon tax credits."

This assumes no subsidies for oil and gas (plenty, including depreciation below cost basis!)

In terms of credits - those are in the 2%-3% range of revenue.

In terms of SpaceX being the most dependent on the govt - totally false. Things like SLS are cost plus, have cost $20 billion with almost nothing to show for it. SpaceX is so available, cheap and reliable they are literally launching ESA payloads (ESA won't even mention them its so embarrassing), most commercial payloads that can actually go to bid and competitors payloads (looking at you Amazon).