Your posts nearly always seem intelligent, with the exception of when you reply to me
Unless you're being facetious I know you're clever enough to understand why adding additional loading for a particular training may not be beneficial to that training and where the absence of that loading have have no negative impact on the benefit of that training.
If I had two more dives in the pool or in the sea with my new rig then sure, I would do the course with the new rig. However I don't, am unfamiliar with the equipment, it isn't fully adjusted yet, etc. so there would be no benefit from doing the course with this rig apart from seeing how I'd do with the additional loading. No harm in that of course, however to suggest that there is harm in the other way (sans additional loading) just makes you sound dogmatic (and silly).
I may be doing the course, including pool, with a dry suit as it happens, and I've never used one of those before either, so I'm intensely relaxed about using my old jacket rather than something I am not yet familiar with. If I get my way I'll not be using a dry suit either.
To turn your platitude back on you - I'll train the way I dive, and dive the way I train: with equipment I am familiar and comfortable with.
Cheers,
J
p.s. in any event, your imaginary scene is unlikely to occur: I don't drive