Why are pre set builds a thing . Pay to win

As I have said elsewhere. Pre set builds are great for the casual EASHL players that just want to get on and play, avoiding any setting up of their players stats, attributes, xfactors etc.... and yeah like Kla says, they are all free to get during that season of play by playing one and in the rare case, maybe two games throughout a 50 day season. Its only bought if for the skin that comes with it.