This is the result of using science to prove philosophy. Theres several flaws with the approach of claiming brain similarities to common conditions in the opposite gender = proof that sex is a social construct.
They focus on the studies that support their findings ONLY while ignoring others.
Science is important in defining objective terms and labels for cross examination and referencing in regards to our physical world.
There are absolutely instances where atypical brain differences are observed in trans individuals, however these findings are not consistent, and antigender activists use these findings to try proving a negative.
Plus there are people who do not identify as trans with these brain abnormalities. Are they in denial? Do we begin assigning gender based on brain scans instead of overall physical biology?
Secondly there are trans individuals who do not show these brain differences between individuals before HRT. Are they faking? Should brain scans be required before sex reassignment is allowed?
Thirdly trans individuals express the behaviors of the opposite sex based on local culture in relation to behavior seen as masculine/feminine based on those cultures.
If transsexualism was universal in its expression cross culture as many behavior are between biological sex, consistent in the observed differences in the brain, detectable BEFORE puberty like inter-sexed individuals are observable in the womb based on their chromosomal signature, AAAAND the vast majority of individuals in this category all expressed a desire to transition or personal view of themselves as being the opposite sex then one could make the scientific claim of genetic determinism towards sexual biology existing outside our established knowledge of dimorphic xx/xy chromosomal split.
As all research stands evidence points to transexualism being a combination of psychological factors and cultural interpretation of expected gendered behavior being the primary cause behind these individuals personal struggles with accepting their physical bodies. Current brain studies are inconsistent in methodology and findings to prove gendered brains while denying human brain plasticity and environmental impact on brain development.
At most these studies are helpful in determining the degree which dysmorphia affects the individuals suffering from body image rejection the same as many other equally common body rejection disorders which preset atypical brain pattern development.
First link is an article, not a study. It is very technical, and does NOT indicate anything upholding your point of view.
Both of the study links you provided have very, very small sample sizes.
With the third bit you posted (that I highlighted); you create your own conclusion from another article. Nothing inside the article argues against the existence of trans individuals. You are extrapolating your own personal feelings from these.
Really don't understand how you think that arguing for trans existence someone refutes brain plasticity. Who the hell said that? Nobody.