This is going to sound harsh, and I suppose it is . . . but you made some risk calculations for yourself, and decided to do that dive by yourself. What would you have done if you had had a problem at 165 feet, and YOU needed gas? Would you have quietly drowned? I don't think so. I think what you did was obligate the rest of the people in the water with you to save you, without their assent.
I have no problem with someone solo diving, assuming they have the experience to do so. I have a BIG problem with people "solo diving" when, in fact, they are actually a member of a group, however loosely knit that group is, because at that point, any member of the group can be called upon to do a rescue they didn't plan or agree to do.
When I do deep dives, I do them with a team. We all have well-maintained equipment and well-trained skills. We all subscribe to the same philosophy when it comes to planning and safety. We accept the responsibility to rescue one another, but with that comes the understanding that the other team members have done everything they can to avoid needing a rescue. On a 165 foot dive, I'd have rock bottom to get me and a teammate to our gas switch. If I had to rescue somebody NOT on my team, who hadn't done the appropriate planning and didn't have appropriate reserves, I'd do it, but I'd be a bit steamed about it.