Or perhaps it makes you complacent regarding the things that could happen on a drift dive in Cozumel. The fact that everything goes smoothly and you never have a problem makes you lower your guard and think there is no situation in which you might need a DM saving your tookus. If you worry about taking your own SMB, mirror, sea dye, whistle, PLB, and prep and then say I would be happy to dive with out an expert in the local conditions and such, how does that reconcile except in a chest thumping, "me super diver "thing?
Again, and no insult to you Fin, it strikes me as this recurring superman theme. If you agree you should have a good DM along who is ready to assist, then you aren't a REAL diver. REAL divers have a good buddy and all the crap stashed in their BCD and the rest doesn't matter. If you can't clip it to you or your buddies BCD it is superfluous equipment, DM included. If you think a DM who can save your butt is a good idea, then you are lacking in skills. You also have to be able to pee the furthest standing up..... Isn't that the precise thinking that gets people hurt??