There are a few problems with the "everyone carries a cellphone camera all the time these days, but no one has snapped a ufo" proposition :
- most of those people are literally looking down, (not up), with their faces glued to their screens
- cellphone cameras are pathetic at picking up ufos. It is extremely rare for a ufo to come down close; every one i have photographed i would estimate 3-5km in altitude. They look like just a tiny (but very bright) dot to the naked eye. You need a powerful zoom camera like a nikon p1000 to achieve the photos i get. I have a superzoom camera myself called the canon powershot sx60. My ufo photos were taken at a zoom factor of on average 210x.
- if you did try take a photo of a ufo with a cellphone camera, it would look like just a vague, tiny dot against the blue sky. Then, if you were to post said photo online for others to see, all you would receive is criticism along the lines of "Wtf is that? Looks like you placed a grain of sand against a piece of blue paper"
Plenty of people in ce-5 groups are using their cellphones though, as not many people own powerful zoom cameras.
I've seen no shortage of phone camera footage of tiny moving dots in the sky