I think the more likely explanation is racism. If the pyramids were in Europe, nobody would challenge their human origin but pyramids are in Africa Surely aliens are involved.
For the privacy of the user, nowadays the referer header are either shortened or voided by the browser. You reintroducing the string by a side-channel could be seen by users as a backstab, even if you see it as "etiquette".
I'm tired of trying to find excuses for their bad behaviours. The first goal should be to protect the victims. By whatever is necessary. People have a right to live in security. Then, once that first step is done, we can think about pampering the bullies into conformance. Not the other way around.
In practice lot of applications hard-coded some elements' color while following the theme for other elements, making dark theme unusable because you end up with black text imposed by the developers over the black background you choose for your theme, and other similar issues.
I use Firefox since it started. At first because I liked it's license. Later because I was in love with the way I'd did things and the add-ons ecosystem it spawned. The first major disagreement came when the search bar merged with the location bar. Then FTP support was disabled. Then RSS bookmarks thingy was removed. Then that stupid hamburger menu appeared. Then features I don't even understand like Pocket appeare. But I continued to use Firefox because the alternatives were worse. Now I keep using Firefox because of apathy and I'm basically the boiled frog of lore.
I've tried a few time to read le Journal du Hacker, the french-speaking clone of Hacker News and each time I've found that the writing level is so low it's basically unreadable.
Being put in contact with foreign contents? Disgusting! /s
More seriously, before Netflix I never knew how high-quality and fun was stuffs from all around the world. I watched great series from South Korea, Turkey, Jordan, Spain,France, Luxembourg, Germany, Scandinavian countries and South America. I also watched quite enjoyable movies from Nigeria. I probably forgot a few places too. Do Netflix has issues? Plenty. Their originals are often blands and cancelled. They taught me to seek mini-series and completed series instead of ongoing series. The wrestling they air is shit. But the availability of foreign contents is the coolest feature they have.