Studies like this are part of what peaked me for a few reasons:

1. They proved that sexuality is innate, not that some people are 'male-brained' or 'female brained'. When they cite studies like this as 'proof' of transness they admit their own homophobia by implying that gay men aren't 'real' men and lesbians aren't 'real' women because they're same sex attracted. Okay sure, we have proof now that certain brain differences are seen in those attracted to men vs those attracted to women. That says absolutely nothing about gender dysphoria being a product of having an innately male or female brain in a body that doesn't match.

2. Studies like this only provide insight into the homosexual transsexual type of trans person, i.e homosexuals who transition in order to be 'straight'. This means fuck all for 'eat my boy pussy' gay trans bois and 'suck my girldick' transbians. Because these people are heterosexual.

Gina Rippon didn't necessarily set out to debunk the idea of trans people having opposite sex brain, but her book "Gendered Brain: The New Neuroscience that Shatters the Myth of the Female Brain" compiles various studies to pinpoint if differences do exist and she wasn't able to find anything definitive. Another study 2018 study "Sex Differences in the Adult Human Brain: Evidence from 5216 UK Biobank Participants" says outright

There was considerable distributional overlap between the sexes. Subregional differences were not fully attributable to differences in total volume, total surface area, mean cortical thickness, or height.

You can read it here: https://academic.oup.com/cercor/article/28/8/2959/4996558

Figure 1 shows visually just how much overlap there was between the male and female participants. With this amount of overlap you'd think something like 40-60% of the population would be identifying as trans. But that's not the case.