No, you're confusing energy (kWh) with power (kW).
The car has a ~75kWh battery. That's how much energy it can store. But that doesn't dictate the charging rate. The charging rate generally goes down as the battery gets more "full". I'm not sure where a supercharger will cross over to below 60kW, but it wouldn't be hard for someone to run a test and figure that out.