You can, you just can't do billing on SuperChargers. Home charging works... cars work, but it's like credit cards didn't work at the gas station and there was nobody there to take cash.
You can do the same in Europe with EVs. Europe standardised on CCS Type 2 Combo for EV charging so you're not locked into one charging network. All brands of DC fast charger can charge all brands of EV, exactly as it should be.
Some chargers are working fine. Ionity, BP (ironic)
Some will not initiate charging because registration email/login/payment in their app does not work. (Freshmile in France, some Swedish one in Greece whose name I forget did not sent an activation email)
Some chargers just straight out doesn't like your car, because reasons. "Find another charger" you will be told. (Fortiza)
Some chargers are just broken, but you can't tell until you arrive. (Another Freshmile in France)
Yes, there are better and worse ones. Spend your money at the better ones.
> BP (ironic)
Why is BP ironic? They're in the energy business. So is Shell.
Of course there were lots of cases of fraud linked to those too.