You're free to dive as you please, but you have the dir answer and procedure. I'm not going to go line by line and answer ever single question you pose.
To clarify... is that an 'official' DIR policy, or is it a personal or instructor preference?
I don't claim to be a DIR diver, although I do find merit in many of the principles adopted by the system. Its easy to assume that wrecks and caves require the same approach - in many ways they do... but there are differences and those require consideration.
There's stuff that a DIR diver carries for a cave dive, and not for an open-water dive.... and vice-versa. Wreck diving demands that all those items (and more) need to be carried. The simplistic solution of "stick it in a pocket" just doesn't fly.
I've dived with dry-suit pockets, wet-suit pockets and X-Shorts... none of those provide sufficient capacity, flexibility and accessibility to carry all that I need for a wreck dive - especially multiple spools and DSMBs. Of course, if those pockets were
otherwise empty as they are for the typical DIR OW diver... then it'd be a different situation
But if taking a spool out of a pocket without drifting is tough, you might want to scale down a little.
There's no need to be snarky. I just asked some questions and presented my opinions and experience.
If you don't understand what I'm talking about, then you're welcome to come and dive with me - clarity prevails when experienced first-hand, not vicariously through an instructional methodology.
I'm genuinely interested in the DIR 'take' on wreck penetration. I don't see or hear much about it from the community, so I do wonder how it is addressed - or even if it is formally addressed. Whilst 99% of the approach/training/methodology may be shared between different overhead environments, there is still the 1% that differs - and that 1% is what I am questioning here. Small things... but as you know, small things can make big differences.
I'm also genuinely interested on the 'spool in the pocket' concept - as cave divers sometimes have to deal with high-flow (as wreckers deal with current running through a wreck). Less potential entanglements in a cave possibly, but the need to swiftly anchor a search line in those conditions must be equally applicable to both situations. My definition of "swiftly" obviously differs from yours, but then, maybe you've not had a buddy rapidly drift down a passageway during a silt-out?