Don't be so sure.
I think there are members who, like myself, have nothing to go on other than hearsay. Electric bass and double bass, while not being mutually exclusive, tend to polarise players. There are lots who do both but I don't think that they are a majority.
Personally, I am keen to learn about both. I don't play an upright. That isn't to say that I never will.
Slap, as it's generally known, has a lot of nonsense associated with it. You yourself have said as much in your earlier posts. To make sense of it, perhaps it is best to look at the whole thing. I think this is important now more than ever as the lines between upright and electric bass are becoming blurred.