I never once said CMs won't listen. I DID say that by approaching a GR CM with complaints about a policy that is in their own best interest (and which, again, has comparatively little to do with guests) you would be putting them in an extremely awkward position. And yes, CMs will hear you out because it is their job to do so, and they will placate you out of necessity. But they're under no obligation to genuinely agree with you, and most will not. CMs can and often do handle unfriendly guests politely & diplomatically w/o betraying their own feelings/opinions on a given issue. This is nothing new.
Not sure what the problem at Disney is that you're referring to here, but if CMs privately disagreeing w/ you = bad guest service to you that might be the larger problem of the two.