I mean, they are just the same note repeated all over again, okay that can sound good when the music is played together but how am I supposed to practice that?
That's a common problem in piano music I am afraid. The left hand tends to be boring practiced alone. So it is often practiced much less HS than the right. Which is not good....That's why I had to start an etude for left hand only, my left felt ignored and left out so I wanted to give him some special attention.