If I am stuck on something, and that something is in your realm, either for understanding or providing, then I might be stuck and unproductive until you answer.

e.g. I send you a message - I am trying to use 'xyzzy' which you provide. When I send it 'plover' I do not get back the response I need. Am I doing something wrong? <crickets for 3 days> WTF why can he not respond in a reasonable time frame? 1) on vacation, 2) sick in bed 3) over worked 4) a jerk 5) missed my email. In an office I can walk over and say WTF? Where I will easily find the new person who took his place, since he moved on to another job.

I am just reading your other comments and I am getting the impression that you don't want honest feedback but just confirmation that remote work is good.

People who are focused on task are easy to distinguish visually, when you are in person.