seaducer
Contributor
In general I would agree with you seaducer, but the dive in question was at a resort where "resort certifications" and new PADI certifications abound. Part of the sales pitch is safe diving under the watchful eye of experienced DM's. Thus my second issue of the guide multi-tasking with at least one newbie in the group. As a lot of new/occasional divers do use resorts of this nature, I don't think they should be excluded from consideration.
If they advertised DMs specifically for mentoring new divers, and that is what was paid for, then that is what you should have received. Then I would agree the speargun should be left on the boat. The float is their job though, can't leave that behind.
OTOH this would be outside the normal operating procedures. It is quite likely that you will see those lines advertised but to be honest most DMs treat all divers as if they know what they are doing. That includes divers on their post OW class dive (who for the most part are some of the safest divers there are...