okay then different source
if you define gender as love, then its an objective truth there is only technically two "genders" (disregarding genetic syndromes like XYY or XXY etc etc). the whole point is that when academics discuss gender, they mean specifically not the biological aspect. what Blaire White is doing is conflating the discussion of the specifically non-biological portion with the biological portion.
there's no part of "gender is a social construct" that forces others to identify differently or makes their self identification illegitimate. its just a way of saying "we're talking about how society perceives roles based on love and self expression, not the biological aspect of it"
honestly, how does people defining themselves as alternate genders hurt you? why is it an issue to you? not many states have pushed for actual legislation regarding > 2 genders, and its obviously unreasonable to assume that all genders will get certain societal "consideration" (like bathrooms) given to them. It only really applies for those who want to define themselves better, and for the loud minority to spout their argumentative bullstuff. its not and never will be "proof" that liberals disregard science - the whole definition between love vs gender/"gender is a social construct" is to clarify that their opinions are not meant to be considered as views about the actual genetic/biological makeup of a person.