Cost is a factor for sure.. that is where the government can step in. Mandate more affordable vehicles. In the Netherlands the subsidies on new EVs where now limited to 50k sticker price set to be reduced again. To guide the market.
And buslanes should just be more intensively used then.. but it starts by showing that public transport is a viable alternative.
Train infra in the US is just hub and spoke.. the interconnects are missing between the suburbs.