They do, but no one wants to go to one of the few Nissan dealers in their area to charge their car in the event they need it. Not to mention, many dealers only have 1-2 chargers total, which is not sustainable for the number of cars that are (or will be) sold.
Plus, what about the Bolt, Volt, i3, Soul EV, or any number of other EVs? They wouldn't be comfortable or possibly even welcome at a Nissan dealership to charge.