Yes, it is not good practice to be heading uphill on a 1.5 hour hike to the top...at 3 pm. Sunset was at around 5:35 with civil twilight at around 4:50. Going down is often just as slow as going up. It's interesting the skier didn't mention the dogs.
She would have summited just 20-30 minutes before light began to fade and gotten back to the point where she was seen (still pretty far up) well after dark.
I totally agree - however, I don't think it's a sign of mental difficulty, much less "depression" or anything like it.
However, many people around the world do live for long periods of time with just 1 other person (or alone) and they are fine. We are all different.
This particular couple had taken time apart prior to this (she had gone off solo hiking, I think his health problems made it harder for him).
My point is that we should not assume she was depressed or in a diagnosable state of mind merely because she went hiking alone. Or that they were having difficulties as a couple. This seemed to be their pattern long before COVID.
I do have questions. Where was Dan during all of this? Since some have assumed 2 people and 5 dogs were living in the camper van, that would mean that Dan and the 5 dogs were at the camper van - and yet it seems he called rescue from somewhere else and isn't present on scene. Is that correct? Do we know?
The one article says "they are currently in separate countries." What does that mean? Is he in UK? If so, he's staying somewhere other than the van, obviously. So they weren't in fact 24/7/365 together and somehow, he has another place to live.