OK, I think you have misunderstood what I said, SR 71.
Effoh can (as far as I'm concerned) practise raw data as long as we are in an easy environment where errors will not cause anything more than a slight embarrasment. Raw data (I'm not talking FD) approaches can be flown heads down simulating IMC, there is no need to be in actual IMC to practise this.
I will not allow handflying, raw data into LHR in IMC. Period.
Last I had a FD fail was four days ago. The Effoh side was ok, so I handed controls to him. Should I fly raw data just to prove I can?
We practise raw data every sim session. And I practise in the aircraft. Just not when the workload is at peak WITH all systems working.