Now Izuku is born and most of his youth goes as canon, until, but his dad didn't run off like the shonen trope dads do, he actually supports izuku's dream and loves him unconditionally, inko however doesn't share the same sentiment as he does.
Inko wants Izuku to go into a career where she can then piggy back off of izuku's earnings, like a scientist, or a hero, but if he can't she'll get rid of him and maybe try for another baby, someone who'll be more successful.
Four years after Izuku was born, his father noticed izuku's higher intellect, so much so that while his class was studying the times tables, Izuku was doing algebraic equations, when they are reading about Hansel and gretel, izuku's reading about psychology and learning advanced stuff.
They took Izuku to the doctors, where Izuku proceeded to educate himself on anatomy and became practically a human lie detector.
Inside the doctors office.
Doctor: I'm sorry, but your son is quirkless.
Izuku: if your going to lie to us at least make it convincing to everyone, your physical tell is that your finger twitches when your lying, the only plausible explanation for that is simple, my quirk is an intelligence multiplayer, my age times my IQ, this can actually be beneficial to every line of work.
Izuku: for hero work, I'd have to work out so my physical strength isn't far off, but to do so would be a waste of time due to hero exams nowadays are focused on the physical abilities than on how smart or capable they are to do the right thing, a flaw in the system is that it cripples the possible heroes who's quirks don't use overwhelming might or are physically based, resulting in muscle headed heroes, who stand no chance of success against someone smarter than them on a level playing field.
Izuku: an observation I made is that out of 1,000 people with quirks that don't grant them an edge in battles, only 2 in that number successfully become heroes, and that number is shrinking rapidly, by the time I go for it, it'll be too late, heroes will see people with my quirk as useless in all fronts, why you may ask, simple, quirks like mine aren't flashy, they don't wow people, quirks like mine do nothing that is super helpful in heroes eyes.
Izuku: alternatively, scientists have become more cutthroat to the point where I can tell they are plagiarising others work for their own gains, starting a business with a quirk like this is also out of the question, since most businesses leaders nowadays have extremely flashy quirks, a running theme, flashy and powerful quirks seem to get a spotlight while quirks like mine are kicked to the curb and forgotten, if your quirk is really powerful but not as flashy, it's deemed a villains quirk, but villains nowadays are complex, some have families and/or are treated like an outcast and neglected, so heroes attack people who are just troubled.
Hasashi: (reaction below)
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Izuku: exactly, if heroes treat others horribly, for their reason and alibi being, 'I'm just doing what every hero does.' and 'they were a villain.'
Izuku: if anything I have a theory, a villain will have five primary reasons for existing, 1, they were treated horribly and therefore just need guidance and help, 2, they're victims of a misidentification or discrimination so they had no choice but to play out the role, 3, their forced to do so or were born and raised like that, or have nobody raising them, 4, they were born or got addicted to crimes, and finally, because they want a fight and because of this, hero schools rejected them for their violent behaviour or hostile attitude when that could be ironed out.
