Never said more, or that one takes precedence over another. They are all important aspects.
Having a decent cordon doesn't come at the expense of having a 5th bowler at having a balanced tail.
The thing about having a 5th bowler is that they are never as good as specialist bowlers and there's a drop off when they come on to bowl. The thing about even Imran or Hadlee is that while they are better than many tail enders, they still aren't specialist batsmen, so again they can't be expected to perform as well as the top order guys. With slip fielders like Sobers, Smith, Hammond, Simpson, Kallis, Lara, these guys are brilliant at both their primary / tertiary disciplines.
So while it's always said about extra runs, if Bradman, Sobers and co are struggling, what will having Akram at 10 accomplish. If Marshall or McGrath is being carted around the park, will Kallis or Sobers make that great an impact besides giving the front liners a rest.
Again, not saying those roles don't play a part, but it's to lesser degrees, especially at this scale. But a cricket team requires batting, bowling and fielding and if you ask any great bowler what he wants more than anything else is great support from the other end and great support in the cordon. And it is a specialist skill, and those who are better than others. Makes no sense creating edges if they will be shelled. And to say it doesn't matter who's back there is a little bewildering to me.