Yes! There are people you can send a numbered list of questions - 5, even 10 - and get a structured, definitive response from them in return, and your task is done.
And there are people you just can't collaborate with in that way - you'll never get back what you need.
You get one sentence addressing the simplest interpretation of the simplest interrogative clause across the body of the message and as far as they're concerned it's off their to-do list.
For these people I need to physically impose my presence (or at least heavy breathing over audio) to elicit the minutes of time spent on task required to obtain the information I need.