How come NPC Bikini Competitors in bodybuilding lack big biceps and hard six pack abs to someone like bodybuilding champion Cory Everson?

NPC bikini competitiors are female bodybuilders and primarily natural competitors meaning that they do not use steroids or other anabolics.

Bikini competitors are judged on figure and not so much muscularity, that is why they do not have big biceps and hard six-pack abs. They just don't need them for one and in order to obtain muscles that could compare to a male they would require the usage of anabolic steroids.