You obviously have no understanding of what gender dysphoria is, or of the transition process.  You never questioned your gender because it was the same as your body.  Try to imagine what it's like for someone where that isn't the case.  And at that age the only changes made are to clothes, haircut, and name/pronouns.  If the child changes their mind (which almost never happens with trans kids), no harm done.  Also, please stop quoting McHugh, who has been disavowed by every medical association out there as a quack, including Johns Hopkins!  Spreading fake news is not the best way to go about convincing people of your opinions.