Circumcision I certainly oppose.
But the rest? How are they in any way irreversible? If the child wants to go out and get their teeth made crooked what is stopping them? Or if they want to go out and roll some dice and if it comes up snake eyes they snap their spine to produce the same effects as random polio infection, what is stopping them? And if they choose to believe that the Earth is flat and refuse to add up ever again, what is stoping them? None of those things have irreversible effects. The effects can be reversed quite easily.
In contrast a child can’t decide after they’ve been dead for five years that hey want to come back to life. And they can’t decide after a limb has been cu off that they want a fully functional limb back.
By your rather pedantic usage of “irreversible change”, where apparently education isn’t reversible, then there are going to be a lot of circumstances where both options are irreversible. In those cases there would seem to be a very simple metrics by which to choose: which option limits choices the most. Is it harder for a child who has been educated to choose not to college and so end up just where he would be if he were uneducated, or is it harder for a held with no education to attend college? Is it harder for a child who has never contracted polio to inflict permanent, random nerve damage on herself by drinking poison, or for a child who has polio to magically regain full use of her limbs.
Even if we accept your extremely pedantic and narrow definition of irrreversible change there’s nothing complicated or unworkable about this. If a person, as an adult, can willingly mimic the effects that the change would have wrought and go on to live a lifestyle concomitant with that change then the change is reversible in effect if not in fact.