This is pretty simple. Just depends on which style of chili you prefer.
The ground beef based concoction served in many parts of the country as "chili" really needs beans. If only for some texture.
Chili built chunks of chuck really doesn't need beans. The meat has some texture, and good chile flavor with good quality beef doesn't need much else.
I prefer the latter, so I don't normally prefer chili with beans, but I appreciate both styles.
Beans, in general, are very good, btw, and to suggest otherwise is crazy talk.