Don't be so cynical

we need to seriously try and understand why this discrepancy exists and how to bridge it.

One possible explanation (in my opinion) is that so many MG symptoms are complex and hard to understand (and manage) that it is much easier to ignore them, or decide they have improved (even if only because of better adjustment to the illness or better supportive care) than to deal with them.

And when your neurologist tells you how glad he is to see such significant improvement in your condition, what are you, as a patient, going to say?