I think there are things for his family to take comfort from:
1 - cctv/coroner result are giving a time of death which means from the point in the walk he started suffering until he became unaware/collapsed, is likely to be less than an hour. So he didn’t ‘suffer’ for long. His body being found in some of the other possible outcomes when he was missing could have meant that he was suffering for days before death (lying in a cave etc)
2 - He was still trying to reach help right until near his final moment, meaning that he still believed he could do it and hadn’t given up on himself. That means he was mentally strong and pushing himself to to survive and wanted to do that for himself and his family. Although physically failing he may have been mentally thinking he was going to get there and not realising it wasn’t doable (which might be why his wife is seeing it as comfort that he ‘nearly made it’)
3 - The wife and friends were going back on the 4pm water taxi, so it’s unlikely they could have even realised he was ‘missing’ until 5pm at the earliest. If there was any debate and self-searching and thinking time before they made the decision to report him as a missing person at 7:30pm, any delays would not have affected the outcome. So they could not have saved him.
the blame here, should actually fall on the island government (although clearly the mayor did an excellent and dedicated job with the search party). This path had a distinct entrance point at the end of a road in a residential street…so why wasn’t it gated off in heat where it is unsafe to walk in? If it’s dangerous even in cooler weather, especially seeing as the island doesn’t have a hospital, why have it open at all? It only leads to one very small hotel/marina. That marina is served by boats not a road, the footpath isn’t safe for general use, maybe hardcore hikers only might generally want to try it, but surely it’s better for the island to just close it off and not have these risks? Gates that open one-way only (so people can exit if they somehow got in, but not enter) would be the solution.
It would be interesting (I haven’t seen it anywhere) to know what the entrance to the path looks like from the Pedi side. Whether there is warning signage and how much of it, (and if so, how clear it is that it’s not a general precaution bit a serious risk of death)