Well, let's see...someone who has experience to 130ft, has dived this area before, and dives doubles vs someone who has very little experience to only 85-90ft (very few dives outside their Deep Diver class), will only dive an AL80, and refuses a pony.
You tell me which one you'd prefer to have on the trip? The prepared one or the one who isn't and won't?
The attitudes I've encountered between vacation divers and those on the Great Lakes are vastly different. Some vacation divers I've talked to seem to think nothing of going as deep as they can on an AL80. "Why would I carry extra air with me? That's what the dive master is for." (I'm not joking. This conversation actually happened). Going deep inside a wreck is OK because the dive master says it's OK. It's different up here - you're responsible for yourself and your buddy. There's no DM to "save you." Frankly, I don't want to be diving with someone who has the mentality that an AL80 is just fine for a 130ft dive and thinks that redundancy isn't ever needed.
EDIT: If someone is really questionable, I'll just run their diving CV by the captain and get his opinion.