> the costs associated with sending email aren't nonexistent
> Of course infrastructure costs money.
You do realize you're.. well, you're not contradicting yourself, but on the one hand you agree it's obvious and on the other hand you insist it must be pointed out.
My example about money was just that. I could use Western Union or a bank transfer. Those things also have non-nonexistent (sic) costs. If you start pointing out everywhere that "Oh but there's this cost you didn't think about!", you won't be done by next week. You know all those libraries that let you check out books for zero cost? Reading those books requires education, which in turn is no free (No matter how much you wish to contradict that statement, the road you've taken requires you to admit to an unending set of cost upon cost which you don't think about in your day to day life).
You live in a society which expects you to have access to certain things. In the case you can't, there usually is infrastructure in place to help you out at little to no cost.
So again, please, just take this in: You can communicate with people at the other end of the globe. For free. This is not a legal forum and we don't need asterisks everywhere.