I can’t remember the last time I had a guest who actually looked like their photograph. I’ve hosted hundreds of guests whose profile images have been a flower, the beach, a tree, a glass of wine, a guitar, a baby, a car etc. etc. etc. and an accurate photograph means nothing to me.
No I don’t host in my own home but did in my B & B days. It was different then because there were never any photograph at all, never any reviews and no review system to prevent a guest behaving badly. Sometimes a guest would turn up on the doorstep unannounced, suitcase in hand. There were also no CS people to run to.
I honestly doubt that anyone can tell what a person will be like as a guest from a selfie.
After booking is a good idea so that in-home hosts know who they are looking out for when the guest arrives but that’s the only advantage as far as I can see.