Most judo is quite definitely taught as a sport rather than a street-fighting art, yes, but this is not strictly a fact about the art of Judo. Such is Kodokan Judo, which is by far the most common form, focused almost entirely on Judo as a grappling sport (to the point where many judoka don't even know that atemi-waza (striking techniques) exist, despite the fact that they're in the kata).

it's certainly possible to teach Judo as street-fighting, but most people who want that will go for jiu-jitsu. Judo is (deliberately) 'tamer' than jui-jitsu, so as street-fighting, it's really best suited for limited self-defense. It was quite common in police work in Japan, not sure if that's still true.

(This makes it very useful in situations where your response to assault is legally limited, which IIRC is why it was popular for police. It is much less natural to respond with excessive amounts of force when using judo)