For Amateur MMA do you have to have training in stand up?

you have to be skilled in all areas of fighting, stand up and grappling. Look what just happened to Demian Maia he's a world cl jiu jitsu expert, but isn't very good at striking and he got knocked out you have to be good at everything, striking, wrestling, jiu jitsu, ect. if your only a jiu jitsu guy your not going to get very far. And also training in the Gi is fine and stuff but are you going to be fighting with a Gi on??? NO your not so you need to start training No-gi. Train how your going to fight, if your fighting mma you have to be training MMA. MMA is mixed martial arts.