It is also the case that people aren't as good at writing as they think. I've seen people write pages and pages of text to say a few simple things, don't separate the important from the unimportant, etc, and then wonder why others don't take 15 minutes out of their busy day to read the incessant, flavorless text until they find the actual point.

A good way to write text where you're going to ask people for stuff is to write it in a top-down manner, where first of all you mention "I want X", then you quickly summarize what exactly you want and why, and then write a more detailed paragraph on the various nuances, always making sure to cut everything down to its absolute essentials.