Det enklaste svaret är att vi lär oss (i minionsfilmen) att det är hur de utvecklats. Fisk måste simma, fåglar måste flyga, minions måste tjäna en ond mästare.
Den licensierade junior roman sätter det ganska snällt:
Minions have been on this earth since the beginning of time. At first, they were just shapeless, single-celled organisms searching for the biggest, baddest villain to serve. They’d follow anyone despicable enough — as they needed to be led by something bigger than themselves.
Over hundreds of years, the Minions evolved, growing arms and legs. As they evolved, so did their choice of leader. Each master was eventually replaced—or eaten—by a bigger, badder master. At one point, they followed the biggest amoeba—until he was devoured by an evil fish who, in turn, was eaten by an evil amphibian. They followed that evil lizard right out of the prehistoric sludge and onto a beach… … where he was smashed by a Tyrannosaurus rex.
The Minions were very impressed. They stared in awe at the giant T. rex, with his terrible claws and teeth. He was the greatest monster they had ever seen—so much bigger and tougher than their other master. It was love at first sight.
Med tanke på din sista punkt om minionsna som tjänar någon "fin", kanske du vill notera att även om minionsspelet i allmänhet spelas så roligt / clueless, visar de inga oro om att begå några ganska hemska kriminella handlingar som inbrott, angrepp , kör och flyga utan licens, ha kontrollerade sprängämnen och hjälpa och stödja stölden på en planetkropp.