Hell hath no fury like a competitive nerd being put on a pedestal.
I think this happens a lot anytime someone who perceives themselves as being shunned by society gets too much positive feedback and an iota of power over people.
I think its the same reason why every nerdy twitch streamer ends up being outed as an abusive child predator.
Bearings for rolling stock are actually relatively hard to come by, and there are only a few countries that even produce the two different steel alloys they are made from.
Ten companies in the world manufacture 75% of the bearings used in rail. With like 5 of them being located in Japan, and the rest in the US, Germany, and I believe Sweden. China only produces about 20% of bearings used in rail, but they are pretty much all for domestic use, as they are still expanding their network.