You admit that anything to do with gender dysphoria is more important than a minor transgression. You are right, it is more important than a tattoo, because the stakes are higher if you refuse help.
Delaying puberty does not lead to lifelong regrets, it avoids them.
Gender dysphoria is a life-threatening condition that can lead to lifelong mental health problems, self-hatred, self-harm, severe depression and suicide, and going through the wrong puberty makes it extremely worse.
To even be considered for the medication you need:
a long-standing and intense pattern of gender nonconformity or gender dysphoria.
Gender dysphoria emerged or worsened with the onset of puberty.
Coexisting psychological, medical or social problems, if any, are stable enough to begin treatment.
The adolescent has given informed consent.
Many health professionals and, where possible, parents are involved in the process.
Delaying puberty does not mean that the child has to change gender, it means giving them more time to think about it until they are of age, giving them the time to live as their preferred gender and find out if it is the right one or if they want to stay with their birth gender. At any time the child can decide to stop taking the medication and will go through puberty like any other child, just a bit late (which happens naturally for some children).
It is exactly the opposite of what you say it is. It avoids the damage of a false puberty, gives time for decision making and time to "grasp the choice and consequences" and gives them time to grow up and make the permanent decision later. Everything you say is basically pro puberty blocker.