Not to argue with you Mike....that would be pointless. If you have found one particular dive op to be "Macho" it should not speak to the integrity of the many other shops on the island.
I come here solo most time and I have not found the dive masters here to be( dive here alot have used 5 ops over the years) the "macho" you are describing. For example, with some newer divers this week, their concerns were addressed , plans adjusted and we all went on to have a great time diving. There was no this will be "no problem". Normally that's how things have worked on dive boats I have been on in Cozumel. I am no seeing the macho
thing at all (well to be honest, maybe once) that you claim is everyday on Cozumel dive boats.
The "no problem" could vary from op to op, too. I've seen it on the ops I've used. But I haven't dived ALL the ops in Coz, so can't say from personal experience that it's an island-wide practice.