How many scales do you know how to play?
In classical western harmony, we have only the major scale and three minors (natural, harmonic and melodic).
Then there are major and minor blues scales, the whole tone scale, the modes of each scale, so-called "artificial" scales and then non-western scales...various Arabic, Indian, Indonesian, Chinese, Japanese...
And definitely a bunch more I can't even think of right now.
Jimmy Page was well versed in modal playing and you should be too. Carlos Santana has built an entire career out of the Dorian mode