Okay, but you’re replying to me, and I’ve been arguing that it doesn’t make sense to imagine a world where the player options exist and PCs can use them and have all the available backgrounds (minus setting specific ones), where personal magic is also very rare.
Because it takes generations upon generations of mathematicians sharing knowledge, learning in schools and by way of tutors, ie it requires mathematicians not being very rare, to produce Isaac Newton. So even if we absurdly assume that the PC wizard is the only wizard in the world, or one of 5 globally, there has to be something less than a wizard proper who can cast some basic spells and understands enough fundamentals to teach them to kid wizard.
That isn’t a coherent world, IMO.