Board Thread:Legitimate Canon Questions/@comment-65.93.139.213-20150630121457/@comment-5237598-20150630134239

Peter already said it in season 4: He can't steal Scott's alpha powers. He also says that Scott's not worthy of being an alpha which is why he wants to kill him anyway.

It is true that Jennifer says Peter wants to steal Scott's powers, but imo this just one of the many TW inconsistencies.