Since I sort of danced my around making the point I wanted to make, here's what I'd meant to say more bluntly:

1. Are EAs unknowingly offending large swaths of the population when they proselytize too loudly?
2. I think that people's social circles are more homogeneous than they might predict, such that EAs tend to be friends with an incredibly large number of potential EAs, and relatively few people incompatible with EA.
3. Statement 2) can be the case even if there are very few potential EAs in the world.

Edit to add:

1. The fact that people on the EA forums and elsewhere keep posting about how fun and easy running a fundraiser is makes me question if I'm living on the same planet as you all.