Have you ever been on the receiving end of this NT white lie: "Umm...maybe I'm not explaining myself properly..."
I found that 9/10 times, on reflection, it was just a face-saving tactic, b/c inside they were probably thinking "why do you need me to elaborate or rephrase, isn't it obvious, what's wrong with you"...
I could tell by their disappointed facial expression - so, yes, I CAN tell inner mind states sometimes - but more so in "reactive mode", I can't consistently do so in proactive social finesse mode - better than before, but nowhere near 100%.
Basically I find it's due to the differences in NT and ASD brains in processing communication... we need more verbal input and details to see "the big picture" and just auto-intuit that person's mind-state and why what they're describing may be a hinderance to them, or something they'd find problematic (b/c it's usually with co-workers that I've had this statement). So the NT person is using a lot of facial expression and gestures and so forth while talking, and it's a lot for us to absorb and seamlessly synthesize, so we paraphrase what we think the issue is and why it might be causing them grief but it doesn't quite click.
At least the other person can tell by OUR facial expression that we're legitimately confounded, we're not being flippant or sarcastic or passive-aggressive, which is probably why they don't tend to blow up at us over this honest and innocent misunderstanding. They probably just find it a bit weird that they don't have this issue with others (in general), even though there's no basis for comparison on that one exchange b/c they only asked YOU and they didn't ask anyone else.