The automakers less so. They don't particularly care what powers the cars people buy, so long as people buy them. They were in the process of pivoting to electric platforms, but, being as terminally stupid as they are, a lot of that has been put on hold while they try to figure out why their current $100,000 offerings aren't selling by the millions.
Automakers care about how much R&D they have to invest and the impact on the quarterly profits. ICEs are dirt cheap in that regard, and it took the federal government bribing them to do so.
Putting aside politics, macroeconomics and questions about build quality, one unavoidable answer is...because they want to. The US should get more ambitious.