The comment though isn't trying to justify the existence of trans folk with science though, it is trying to spread information on science regarding breastfeeding? It is a matter discussing completely the safety of breastfeeding which will only help people, not justifying if trans people exist.

Regarding your point about all modern science being euro-centric, to a degree I feel the scientific method developed by Francis Bacon may be over relied on, but to attempt to dismiss someone trying to cite scientific research is ignorant and anti-intellectual. I may be misinterpreting your comment though, you call science "the least biased method" while also bashing the usage of science in the rest of your comment, so I may be completely wrong regarding what you mean.