Practicing these Scales are a critical part of improving your piano playing skill level.
Playing these scales helps you:
Understand the Music Theory (see the Circle Chart)
Aids your memorizing of the Key Signatures
Trains your Fingers to 'know' which black keys to hit
Build finger Muscle Memory
Playing the scale in the key signature of the songs you are learning as warm-up helps
'Train Your Fingers' to play the correct black keys. The more you practice these scales, the easier it gets, and the faster you will be able to naturally play.
Be sure to start of slow, and gradually pick up speed over the course of weeks or months of practice. The more you play these scales, the more 'Muscle Memory' you build up in your fingers.