Neither was anyone else in here. Lots of "expert" opinion based on a view through a soda straw.
It doesn't take much of an expert to see what happened, and anyone can "what-if" the scenario in order to maybe avoid being in the same situation.
I don't like hot/high ops and most 4-seat aircraft aren't really designed to haul 4 adult males around anyhow. This crash simply reinforced my natural inclination to never take an aircraft known for having a slow climb rate into a hot/high situation with all 4 seats full. Yea it's 20/20 hindsight but I sure don't want to repeat that mishap and maybe some other pilot might benefit from discussing the scenario as well.
Plus I did something similar in a cessna 152 with my Dad up at Big Bear Lake near LA. The difference was that we were able to grab another 50 ft or so altitude over the lake before we got to the trees, and there is a little notch in the rim surrounding the lake that we were able to fly through. But of course we planned on circling over the lake for altitude even before we took off, did our weight-balance to make sure we were still "on the charts", and intentionally did not refuel the plane. So the difference between my encounter with hot/high/ohcraplookatthosetrees and this one was an hour's worth of pre-flight planning where we did the math and came up with a back-up plan that did not rely on hoping the plane would somehow make it over the treeline.
Call it 20/20 hindsight armchair quarterbacking, or call it learning from experience, or learning from other's mistakes before making the same mistakes, call it "going to school" every second of every day, it's all good. Note I didn't say anywhere what that mishap pilot "should" have done... He did all the preflight planning he felt was necessary, and it turned out he was wrong. So next time his planning will probably be better and I know for darn sure I plan on continuing my conservative planning process whenever I'm faced with similar situations.