precocious puberty has no real negative symptoms. the only symptom of precocious puberty is being a few centimetres shorter depending on how much earlier the puberty starts. despite this, precocious puberty is still seen as needing to be treated. this is because it's associated with marginalised people. it's not transparent, precocious puberty comes with a lot of double standards.
for one, earlier puberties are associated with non-white children, particularly black girls*. part of this is because black girls are often assumed to be more sexual or mature and capable than their white peers, both common misogynoiristic stereotypes. black people's sex characteristics are often put under harsh scrutiny and treated as inherently androgynous or hypermasculine, it's not really a coincidence that something associated with black people is also something that's viewed as a serious fault that needs to be cured in favour of a white supremacist standard of biology.
furthermore is the general misogyny of it, particularly in statements like "girls who have undergone precocious puberty are more likely to be sexually abused", which while statistically true, places the blame of sexual abuse on the girl's body for being sexually enticing and not the rape culture enabling abuse. precocious puberty is also in general viewed as a "worse problem" when it happens to girls than to boys*, unless the boy develops breasts or something crazy and terrible like that.
that leads into the intersexism of it. precocious puberty is associated with an excess of androgens, and this means that some of the main (known) causes of precocious puberty are intersex variations like CAH, PCOS and hypergonadism. part of the reason precocious puberty is viewed as worse in girls is not just classic medical misogyny, but because girls who go through precocious puberty are more likely to exhibit obvious signs of being hormonally intersex.
could this all be a coincidence? sure i guess. but i also don't have enough patience for the medical establishment to think that it is. i think precocious puberty can be an actual problem if it's like a 3-5 year old who is menstruating or something, but those cases are pretty much never what is being referred to in discussions about precocious puberty.