It isn't "free." They obviously cost it into your rate. Free would mean they eat the cost of the electricity used to charge your car.
I can "make up" dozens of scenarios where an EV won't work in my part of the country. A few months ago, I drove from Socorro NM to Phoenix via US 60 (look it up on Google maps). You cannot do it in an EV.
I've been to Crown King or the Nellie Desert Bar in Arizona, you can't do either in an EV.
Hell, you can't even go to these in an EV reliably:
https://www.dreamcatcherbnb.com/
https://ranchodelaosa.com/ (Presidents a hundred years ago did, but you can't in an EV)
https://www.maderakubo.com/
I know for a fact you can't because I've been there, done that without an EV.
If you live on the East Coast, you have NO clue...NONE... what it's like to live in the Western US and the mileage and ruralness you deal with much of the time. EV's don't work for people in the Western US that want to see the sights.