No, I don't think the dive guide should monitor my gas. I should do that. I don't think my dive buddy should monitor my gas, because I should do that. My dive buddy is there if my equipment malfunctions; the dive guide is there if my dive buddy malfunctions.
If people are diving without the ability to monitor their own gas, I think the solution is to teach them to monitor their gas, not assign them a minder.
If people are diving without the ability to monitor their own gas, I think the solution is to teach them to monitor their gas, not assign them a minder.