You state “steep pitch”. Concrete is heavy. Rain water can get into the crack, and under cement slab. There should be stone under the cement slab for drainage. Eventually “gravity” takes over.
Not sure where you are located.
It get’s cold here in Wisconsin. Cement sidewalks and driveway’s heave up and down. Proper subgrade is important. Last fall had a commercial site that concrete walks were poured. Next day the entrance doors would not open fully. The contractor had to come out and grind down concrete so doors would open. This spring the concrete was removed. The subgrade re-done, and new cement laid. Subgrade was not done correctly the first time. Contractor was in a hurry.
The brick mold in your picture. The structure most probably was built and then the slab was poured. Now you have gravity sliding the slab on your steep slope. You have a hole for water to sit and wick into brick mold, (if it’s wood), and eventually will rot.