All the series you mentioned would have to be censored in a kids block too, i don't know if in Canada the TV is more "free" with these things but here in Brazil Naruto was quite censored, even punches in the face being cut and i think kunais reaching humans too, blood ofc was removed. So many things in OP would be 'problematic" for a kids block, specially all the fanservice, hot girls with big boobs everywhere, Nami would be a outrage for mothers and etc.
My Hero Academia is far from being "fine" for a kids block, characters like Midnight, Mineta, Yaoyorozu, Camie and many others would bring a lot of problems, not to mention all the violence, mature themes and blood that has in the series. Black Clover would be the one with less censorship but would still have one or two things being cut.
You can argue that WSM is a bit more to the "mature" side but it still the same demographic as WSJ, teenage boys, and excluding some few very specific series, everything that WSM publishes could be on WSJ too.