The answer
Puberty is the process through which a child develops adult bone mass, sexual function, reproductive capacity, and other mature bodily systems. Blockers deliberately suppress that healthy process. Chloe’s position is that interrupting normal development is physical harm by definition, regardless of whether a patient later values the result.
Most young patients in published clinic pathways who begin blockers continue to cross-sex hormones. That does not prove blockers cause persistence, but it does undermine the picture of a neutral pause used mainly to create distance from a decision.