Clinton,
To take it further ...
As SUNFISH alludes to, If CASA believes I'm being unreasonable by erring on the side of safety, then shouldn't they 'decree' something along the lines of ... "unless prohibited in the Flight Manual, you shall conduct engine failure training by pulling the mixture" ?
Then we all know where we stand. That's the issue.
P.S. In the above scenario, is the ME Endorsement of someone trained in a 'pull the mixture' aircraft better than that of somone who did a 'pull the throttle' endorsement?
Can you see how silly this is getting?