It wasn't that long ago, that taking a self-portrait with a camera required planning and effort. Usually involving a tripod and a timer on the camera. A process that I and many others only bothered with, either for experimental purposes while learning to use an SLR (ah, fond memories of the venerable OM30!) or because we needed passport photos.
Usually, those of us who exerted the effort to master SLR usage, had other subjects in mind - landscapes, architecture, wildlife, etc.
Quite simply, I've never felt the urge to exhibit my face photographically, unless there's been a reason for my face being in the photo, such as the time I was photographed with a South American swallowtail butterfly sitting on my hand, and I assumed that most people would be more interested in the swallowtail butterfly than me.
I might be a little unusual in this respect, but the photos of me on my hard drive over the past decade or so number fewer than 20, while I have 60,000 photos of insects.
As for a visit to Kenya, I'd use up several gigabytes of storage on the local butterflies alone,
before I moved on to the other insects, and probably erase odd photos of me to make room for more entomology images