> The stereotypical overly aggressive car salesman would much rather speak to you in person than via email even though the same information can be conveyed.

There might be an element of personality there. I was texting with a real estate agent (for apartment rental, not purchase) in China once, when he decided that as long as we were talking he might as well call me. He didn't bother mentioning this to me beforehand.

Of course, all I could do was hang up on him. It's not like I could understand what he said. And I don't think that was especially difficult to foresee.

So he wasted some time and seriously annoyed me in the most predictable way possible. Why? Not for any reason specific to the situation. Maybe there's emphatic training somewhere that says "always call". Or maybe the type of people who become salesmen have a deep, deep instinct to call.