This system is one of the old remnants from the time FKG was just beginning and was still molding itself into a consistent gameplay state. It probably would've made more a difference if 3-medaling missions stayed as difficult and RNG based as the first 3 event were. If 3-medaling missions was still the only goal needed to 100% events, then you wouldn't want new players to be able to do so from the getgo with the help of whales.

Luckily, FKG instead decided to go the route of a more chillaxed and laid-back collectathon netgame. 3-medaling missions does still provide clear rewards like flowergems, so it still does matter somewhat in terms of driving newer players to progress themselves first to reliably complete clear missions.

They do make minor changes to helper squads later, but only in terms of displaying more accurate numbers.