Because no one knows more about flying than yourself..???
(jk)
I have found that this is not uncommon for private pilots, the not trusting other pilots that is. I wonder why?
For myself, when I ride right seat with a PP I find myself reverting to my instructing days and putting on the "I am not paying attention" look on my face while I am really watching very closely.
I don't think I'd feel so uneasy if I was right seat as a CFI, because then at least I'd have authority to take controls if the other person screws up. Otherwise, I don't want to undermine the PIC or come off rude by calling out a situation when they do something I'm uncomfortable with, but I also don't want to die in a ball of fire.
My first experience as a safety pilot was a nightmare... the guy was out to kill us. Despite what his CFII told me, he was NOT ready to fly under the hood with someone other than an instructor. He was all over the place... barely paying attention to his flying and seemed completely flustered and unorganized. He looked more at the chart on his iPad than at the instruments and began entering unusual attitudes multiple times, which I'd have to call him on. After one too many times, I finally said that I wanted to cut the flight short.
His approach and landing were even worse, though. On final, he immediately went full flaps while still well above Vfe. As it should, his speed started dropping, but it pretty quickly got into a territory I wasn't comfortable with. I wasn't saying anything because I didn't want to overstep my place. 65...60... 55... I finally said "
watch your speed," but he didn't react... that's when I pushed down on the controls to get our speed back up. That seem to snap him out of where ever he was in his head, as he quickly goes, "
OH!" and got things in better order.
Then I got to experienced the bounced landing from hell. It's a huge runway, long and wide, and he was hard bouncing all over the damn thing.
I was actually really shaken by the experience. Was determined to never
ever safety pilot for anyone again. But I was encouraged by a couple CFI friends to give it a second chance and to just better vet the next person. I did and the experience was the exact opposite. All I had to do was watch for traffic and help with radio calls regarding traffic. Easy peasy.
Otherwise, flying right seat... I don't know, guess it's a combo of my control freakness and trust issues with others. I don't dig it.