Why Tesla's are bad at towing!

OK there are roughly 50,000 miles of interstate. I'm sure you'd want to add in all those miles of state thruways and such so lets call the total 70,000 miles. These are all multi-lane so let make a guess and call them 6 lanes, 3 each way, on average. Those will be more expensive to electrify so lets call that $1,000,000 a mile which works out to $70,000,000,000. Who is going to pay for that? I vote electric car owners should foot the bill. Plus the O&M costs.