OEMs be responsible for charging networks?? Are you serious?
Sorry to all about remaining a bit off topic.
If the completion does it, private enterprises and/or the government (seriously?) haven't, and they want to be successful, they really don't have any choice. Kind of like including air conditioning and a radio as a standard option in cars. The market drives. Maybe, just as they provide maintenance service, it could even become a profit center in the future?
The big driver for EV sales right now is that Ford, GM, etc just have to make a compelling car in reasonable quantities. Pathetic charging infrastructure, while cheap to do, probably isn't the #1 reason for their current EV failed state. Tesla has left several market segments open for them, but nobody has yet made a credible effort at filling any of them.
This probably isn't really a great idea, it would be good to stick with existing standards. Thanks to lack of foresight (TEPCO), legacy ICE thugs (SAE), and parochial nationalistic/protectionist nations (EU), we're where we are today with 8 different EV charging standards (Tesla, CCS-1, CCS-2, CHAdeMO, J-1772, Type-2, SPI, AVCON). It would certainly be even more stupid to introduce another since pretty much all conceivable current needs are met. Maybe another will eventually be needed if higher power is needed for larger batteries (trucks?).
However, it wouldn't be a disaster, even if Ford or someone did introduce another standard. Today, we manage with about 17 incompatible fuel standards that I know of (regular unleaded, premium unleaded, diesel, CNG, E-85, Tesla, CCS, CHAdeMO, SPI, regular leaded, premium leaded, Avgas, Jet-A, JP5, JP7, JP8, DFM) in the USA alone. It isn't optimal but it does work and some things do require different capabilities.