It's not impossible, it just takes planning and multiple technical steps. Until the last 6 months, no other cars had plug in and charge (with your car telling the charger the credit card number and/or car id)! You had to sign in to an app or scan your card on the charger itself.

Telsa also is the only car manu. was access to enough batteries to ship car in en masse. All the the companies making evs are significantly limited by batteries. Finally teslas have much better energy efficiency/mile. 800v charging and car systems is one area tesla is behind (they are 400v).