The only point that really holds is the second one. Subsidies make EVs more affordable to lower income families. This is a demand side effect. What they don't necessarily do is speed up the supply of EVs.
While hard to predict with certainty, I believe that an instant rebate of several thousand dollars will indeed speed up the adoption of EVs. I'm of the opinion that rebates are marketed by politicians as being for consumers, but are designed to help the manufacturers instead. In this case, OEMs have started to spend money on electrification, but no one other than Tesla has shown they can profit by making BEVs. Legacy does not want to flip the switch and start mass production of truly competitive BEVs so as not to Osborne their currently profitable lineup, at least not while they lack visibility as to when/if they can make money in the BEV space.
Currently, the prices they need to charge to become profitable are too high for the market to bear at the scale they need. If they have an $8,000 to $12,500 pricing advantage vs their ICE lineup which is locked in for a decade, they have line-of-sight to transition their manufacturing process in a way that has a chance to avoid the complete destruction of the company. It also will give them better leverage when they go to bankers/investors to raise debt to fund this transition if they can show clear product-market fit due to the artificially lowered price of the cars.
These factors taken together will derisk a larger, earlier investment in the transition. That clarity of direction will filter down the supply chain to the miners, the anode and cathode makers, the cell producers, etc. More, larger investments in the supply chain seem an inevitable outcome as it removes risk from scaling of these projects too early by creating certainty of future demand. A higher likelihood of profitability for OEMs also seems to reduce the counterparty risk to these supply chain companies.
I do agree with Elon that Tesla does not need the subsidy, that for Tesla, production, R & D, and charger infrastructure do not require supports from the governments to succeed. In fact, this bill as written looks very much like a bailout to US legacy OEMs. However, I think this bill would help the mission of Tesla to accelerate the transition to sustainable transportation by acting as a forcing factor and de-risking apparatus for the legacy transition.
Well, if the union and PHEV provisions are deleted anyway.