Nah, that's a straw-man.
Somebody who's a competent ED player will be familiar enough with every aspect of the game to avoid making rookie errors, at least.
If FDev don't have somebody (or, hopefully, multiple somebodies) on the staff who meet that standard, I'd say the whole "don't play their own game" thing IS actually a valid criticism and concern.
I think Ratcatcher has a point though, no one person (or small group) is likely to cover all the bases, but there probably is a minimum standard of useful experience, and I don't expect community managers (whose skills are more social and multimedia) to be good enough to provide detailed feedback, but as liaison between the players & the Devs it would be good to have enough understanding (not necessarily experience or skill) to understand how the game works and the ramifications of the problems the community feeds back. I think Will seems to do this well, Ed did this well, I'm afraid i don't know who Sally (mentioned earlier) is.
This is getting dangerously close to singling out individual employees and I'm not keen to take the conversation into that territory, but whoever FDev bring to the party someone in the community will inevitably be better at that thing and claim FDev don't know how to play their own game.
Better to just make use of that massive, free resource that is the existing playerbase imo.