@chojinra @RageCraft1 I think for stuff like Magic it may kinda work, in a fantasy setting race and lineage at times matter.
For example a human cannot achieve the same physical potential vs say an orc or dwarf or have the same magic prowess as an elf. Depending on the magic system in this setting, linage / talent might equate to a body's mana (or energy equivalent) cap a person has (especially if it's a family of magicians). It's a reason why on most fantasy settings humans are more jack of all trades master of none type of race while others are more specialized but also have detriments (e.g. elfs have high magic potential, but really weak physically). So humans adapt to compensate, e.g. a mage might also use martial arts to be a battle mage to compensate for the lower magical potential vs an elf.
Though based on this chapter I'm not sure how the magic system in this manga works, he seems absurdly powerful lol. Maybe all noble magicians are reincarnated people are just people who really loved magic (kinda karma thing, where you are rewarded a good life in the next) and their love for it might be what determines the magical cap / potential of a person.
Depending on how this manga goes, like what I said above it might tackle how non noble magicians compensate for their lower magical cap or maybe even have other ways to power up (e.g. the use of Tools like spellbooks or magical staffs). Or it may be a just a manga about a magic fanatic learning about different kinds of magic while being absurdly OP which I don't mind either.