Reason #1: The chances of you being born with a good quirk are absolutely abysmal.
Theres alrady a 20% chance of you being born quirkless, which is very high, but theres also the chances of you having a bad quirk, which is probably going to be around 95% if we’re being generous, leaving a small 5% chance of being born with a decent quirk. And event then, theres probably a 1% chance of those decent quirks being good. All these combined chances leave us with an abysmal 0.04% chance of being born with a good quirk(We’re not even gonna talk about getting on overpowered quirk). Youre probably just gonna be stuck working an average job but the only difference is that you now have a terrible quirk which may or may not be useful.
Reason #2: Crimes would be 10x worse.
These problems are already bad in our society, now imagine a quirked society. It would be much worse and harder to stop due to people having quirks. Why would they fear the law when they can blow up buildings. Infact, the existence of quirks would enable even more people because they have the power to fight back against the police. And hate crimes especially would be the most widespread, especially against quirkless people because those kinds of people would just use quirks as a basis for their ridiculous beliefs
the closest one might be one piece since haki can be achieved through hard work ( lets ignore conqueror’s… and devil fruits, they suck anyway who need them )
If you can get your hands on a sea stone weapon you should be relatively fine against fruit wielders. (Assuming you don’t run into any of the busted ones.)
And conqueror’s can be relatively ignored since the ability isn’t all that great outside of fodder control
yea natsu’s just weird, though as for a teacher it probably wouldn’t be too difficult to find one since wizard guilds are everywhere and there’s probably some magic schools too
alchemy from fullmetal alchemist would actually be pretty interesting, that also doesn’t have any luck in it, and it’s just a science so you could definitely learn it somewhere