does one-time mean he did it once, or it was his profession once upon a time, if he did it once having done the equivalent of porn summer stock hardly seems worth mentioning.
* https://lithub.com/how-did-reactionary-french-novelist-miche...
I mean sounds pretty boring stuff really.
Although I didn't know he was an incel celeb.
Whether it is worth mentioning is a matter of preference, it certainly adds colors to the character.