Why not pyramid?

Hey bros!! Something struck me while I was reading and surfing. They were showing examples of stacks and cycles, everything looked good. It had when to take anti-e's, HCG, clomid, nolvadex. However all the cycles shown were being pyramid. Basically starting low, peaking, then tapering. I was wondering why they did it that way? Considering the effect the cycles here are straightforward?

pyramiding is the old school way of taking gear.it is proven now that difrent esters taper their way down by themselfs at diffrent times

true that, i dont think anybody knew anything about half-lives when they created those cycles the only reason maybbbe for a half-pyamid today is if you arn't sure how your body will react to a cerain drug.