Rocky pillars ARB mission

Why are there low hanging clouds on the rocky pillars map.
Everyone knows you have to fly low to avoid the phoenix.
But on this map there are rocky pillars as the map name suggests that would not be and issue itself but when the clouds get mixed in and you cant see anything it makes it really challenging to not crash into one of those said pillars

for context there is one in the photo tho you cant see it can you ?