I know. Kinda like people who are certain that they have nothing to learn from people they find a little rude.
Proselytizers are just salespeople -- often, very amateur salespeople -- that we give a slightly special status to because they're selling religion, and not, say, recycled batteries. But like most other salespeople, proselytizers usually believe their product or service is more than worth their prospect's time. "Oh! How can anyone not see the value of my size D batteries! Why, their color alone is thrilling! Oh!"