My speculation only: I have the impression that JTNP wasn't really her cup of tea to begin with. Didn't they arrive the day before he went missing, which was the day they were flying out?
It's 100 degrees, the end of a long vacation loop, she already hiked with him the day before, and she was focused on packing and getting back home. Her husband going missing didn't help matters. I have no idea where they were staying, but it must have been hellish to be waiting for his return, realizing he was running late, realizing he was running too late, and then setting searches in motion by reporting him missing. Not to mention you suddenly need to extend your trip for an unknown amount of time and deal with all the logistics of that while they're searching. She must have felt incredibly isolated. No wonder she feels that there wasn't enough being done to find him -- no one could share the urgency and growing panic that she felt (obviously much has been done, but rangers and SAR people need to approach rescues/recoveries professionally, and she wasn't where they were in terms of finding him). I get the sense that she needed emotional and psychological support from her family.
There's always a lot of talk about how terrible the trauma of having a missing family member is, and so many people go missing from home. My heart goes out to her and to other families who have loved ones go missing while they're away from home.