I met someone at a MeetUp that wants to do the PCT. I hope she goes for it. She's in her late 20s and said if she isn't married or having kids by next year, she's going to pack up and go do it.
The philosophy I use is I'd rather try and fail than not try at all. As long as I think it can be attempted safely, it's worth a try. It's really helped me do more outdoors things that might have otherwise intimidated me. I've failed along the way, but trying again was eventually successful.