Review Detail of Hector4684521 in Reincarnated With The Strongest System

Why do the authors always make the systems abilities without any memories or the like for the mc (like if you put an + point in the ice bullet you get memories of how the ice is made, control of mana etc; or if you get abilities of masterie like spear mastery, sword, ice magic, you get the actual mastery over that) The mc its actually a stupid and talentless bstard without his system If someone were to ask the mc about magic he would know nothing