Well I'd say both of us have valid points, but maybe both our conclusions aren't ideal in the end. xD
It's just that the "outside perspective", this "neutrality", invites many logical fallacies. Take research concerning Black communities. Or even Native American history. Many things are excluded from academia simply because they lack the "neutrality" which academia claims to possess—because most facts can't be "proven" in terms of classic academic research, since most of the history has been carried on orally. Academia has so many barriers that have been established by straight white men over the centuries (simply because of the fact that universities were reserved for white men and most of them were straight) that it's susceptible to error because of its rules.
Apply that to modern research, and I think you can see how conventions of academia, of "neutrality", can result in more or less worthless research. Not so much based solely on the gender or skin color of the researcher, but because of their cultural upbringing and possible privilege that comes with it. And privilege can blind us to many of the things we'd like to understand. I'm no exception to that as a white woman, and I'm constantly unlearning certain things that I took for granted as a child, for example (because of my upbringing).
That's what I mean when I say that it is very important who the researcher in question is. What is their background? Is "neutrality" advantageous to the topic at hand? Can they see past their preconceptions? Are they able to truly be critical of their interpretations? Are they open to feedback from people within the community they are conducting research on?
Depending on the answers to those questions, their research may very well be valuable, of course. But the danger of falling into the trap of "straight white academia" is... high. 
But there's still a lot to unravel in modern academia, and we haven't even begun to do that. And so I would always take the research about trans matters done by trans people over that of a cis person, and be much more skeptical when it's done by a cis person (especially when there's no trans people on their team, that's a red flag right there).
Anyway, I think we seem to have covered our stance on this? xD Let's give people the chance to talk about the difference between dysphoria and confusion because of gender roles again. 