If I chew bubble gum and wear a purple shirt, I can't log time either because the regs don't have a provision for logging PIC while chewing gum and wearing purple, if you want to use our premise of why you think you can't log PIC as a safety pilot
Sure, but, if the regs said you had to wear purple to log PIC as safety pilot and you wore green you couldn't technically log it.. in this case purple shirt = adequate vis outside
"In order to act as safety pilot you must have adequate vision out the plane" is written in there. Now what "adequate vision" entails.. that's up for debate. 6 inches, 1 mile, 5 miles.. ? My conjecture is that if you are in IMC (whether IFR or VFR) by default you don't have adequate vision to aid in the safety of the flight, etc. I do agree that people shouldn't be wearing foggles alone, period. And if you aren't comfortable in the clouds, etc., always smart to bring a buddy along. But it is funny the lengths people will go to add every little PIC time they can into their log books.. even though safety piloting really won't get you any landings, XC time, etc.
But at the end of the day it's really not that important to me.. (even though I know it looks that way). People can write whatever they want in their logbooks
Oddly enough I did ask 3 different CFIs about this, and I got 3 different answers. One CFI is brand new (600 hrs total?) one is old and seasoned (7K hours), and the other I have no idea hours but his day job is flying commercial jets.
One said no, can't log if in the clouds
One said yes, because you are required since your buddy is foggled
The other gave some cockamamie answer that I couldn't follow
Tangentially, the whole "sole manipulator of controls" is interesting too.. back in the days of flight engineers, did those guys get to log any time?