I transitioned to male 15 years ago, I was already well into adulthood by that time so had experience to compare. 100% agree with the post. It was night and day. (I'm not in Stem; just generally in life.)

The weirdest thing was some of the individual people who changed how they treat me over time, for the better. After I started transitioning. Its cool they are so trans positive and affirming I guess. But if you can turn that shit on like a tap why not do for everyone?

Now as a man I struggle to notice when I'm getting special treatment. Even with my prior experience. Sometimes I have been oblivious for years until I finally clocked it or it was pointed out by a woman.

It has made me much more respect cis men who manage to have a keen eye on sexism. Especially those who are masc presenting. It is so easy to not notice. It's very comfortable. People are polite. You have good luck. To all the guys commenting here that it doesn't go on around them: it sure as fuck does.

Transitioning to a point of passing in my understanding (mtf or ftm) comes with pros and cons.

I often think about this article as well when it comes to trans men's negative experiences once accepted as men: https://www.newsweek.com/trans-man-broken-men-1817169

Is it me or is this a uniquely American experience?

I loved in quite a few countries and I've never seen this kind of absurd behavior. Granted, in a man, but I've never seen a man cut off a woman like that just because she's a woman, and I've never seen or heard comments even remotely about someone being "exotic". I've heard questions like "ohh, and where are you from?" in genuine curiosity, which is fine, I've never noticed overt racism like that.

Edit: to clarify, I am not talking about myself. Yeah I had idiots treat me like that and you just ignore them. I'm talking about never seeing this behavior in groups. I've lived in Mexico (loooasds of high testosterone machismo there) and even there I've never seen anyone that a women so disrespectful just because she's a woman. Same for skin color or sexual discrimination or whatever. I'm sure it's out there but in Europe, Mexico, Canada, I haven't seen it.

Come to think of it: I have seen some of it. A guy who thought that at in company martial arts classes he could grab women's breasts. I kicked him out immediately, I could not fire him unfortunately as that was not my call. That guy was of course a loud mouth American.

This just makes me think more and more that this may be a problem in all countries, just that it's a huge issue in the US.

And yet, the Supreme Court in the UK claims that trans people shouldn't be afforded the same gender-based discrimination protections as their cis counterparts.

Discrimination is a social artifact, based on performed gender, not biological sex (whatever that means), as evidenced here.

One observation I made is that when women get to comprise a significant part of workforce in science, those things seem to be flattened out.

Working in the place and field (Russia, food technology) where women are about 50% of the workforce, I've never witnessed anything talked about here. Women are taken just as seriously on the position, they are promoted on par with men, they are in charge of many high-profile projects, and actively taking male and female students under scientific supervision. Any sort of workplace harassment will not just contribute to your potential termination, but will earn you very bad reputation - you'll be seen as a dangerous weirdo no one wants to deal with.

One other observation I made is that international scientists often come from the position of entitlement, which is also weird to me. Male scientists tend to flaunt their position any time they can, and many of the female scientists tend to sort of mimic this behavior, but it feels different, like if they try to claw the attention they were consistently denied.

For me, it is weird and unnatural. Where I live and work, some baseline respect towards your more experienced superiors, male or female, is to be expected, is taught since school, and doesn't require such performances. Since most school teachers are female, the role of woman as a potential superior to be respected is clearly defined and doesn't cause questions. Students are not afraid to contact their superiors, but do it respectfully and with full understanding they take valuable time of a high-profile scientist. Why do people have to constantly fight for attention and respect in many other cultures is beyond me.