Unfortunately 411a and (surprisingly) Rainboe confirm their time from an age where pilots were skygods & infallible. If a crewmember calls up to my flight deck & points out a concern, I thank them very much for their input (however irrelevant) & then explain why everything is ok.
And where did I say that I don't? But I am not really willing to have the cabin crew included in a technical loop to operate the aeroplane- there are too many other distractions in a busy cabin to afford a part of the operation to rely on ends being joined in the cabin to achieve a safe operation, so may I suggest we hear no more of it?
Denigrate 411A and moi if you think you have the stature to, but between the two of us we have probably 50,000 hours without breaking the pink squidgy things (well I did break one in Washington, but not part of the planeload, and it was her fault). So come back in 20 years and point a finger then!