How do you obtain a phone number or a mail address? Almost impossible.
And most paper mail gets read by someone's assistant and never passed through.
The people who hoard ALL the opportunities are incapable of allocating them efficiently due to complete saturation of their bandwidth. Literally, if you are someone who are in a position to provide opportunities, you are saturated and unreachable.
These people turn down more life-changing opportunities in an hour than I get in a lifetime. And when I say 'turn down', I mean 'ignore'; because these people don't even have the time to say 'No' to an opportunity I would kill for! They don't even have the time to click on the email or perhaps even read the subject line!