Belly,you probably know 100 times more about this stuff than I do, but you can’t have 50 different types of charging stations where they only work on certain cars.People can’t be stopping at these places with a Lightning and then find out they work on VWs. It would be like you can only go Quick Check, Joe can only go to Gulf, Bill can only go to Sunoco etc.
It's true that Tesla has their own charging hardware in the US. So, if you have a non-Tesla EV you're going to have to use a 3rd party charger.
All other EVs can use CCS charging hardware which is available at all 3rd party chargers (Blink, EVgo, Electrify America...etc.)
Tesla is exploring the option of opening up their charging network to other vehicles. They're currently experimenting in a few European countries.
Of course, if an EV owner has access to home charging, they'll rarely use public charging anyway.
Charging stations can be put up just about anywhere unlike gas stations.
In conclusion, I do not see public charging infrastructure as an obstacle to EV adoption. As vehicle production scales, so will charging infrastructure. It's already happening.