Here's CNN article from 2016:
It's the latest acronym to take the world of sport by storm -- but what is a TUE?
www.cnn.com
The mere suspicion can cause lack of trust between countries.
So why do Russians have lack of trust? In some sports the testing rules have been changed suddenly in the offseason to target medication used by their athletes (Sharapova). Other times, western athletes get TUEs exemptions, some of them are suspicious, some of them maybe cultural difference. This cause the Russians to have contempt for the doping and testing process. They don't trust it, they think it's a farce, so they treat it like a farce. Whoever control the testing control the sport.
Anyone can say the TUEs exemptions are all legit and nobody cheat the system that way, but one person might believe that and another person might think it sounds the same as dopers always claim they never failed a drug test.
Even when 35 and 40 year old athletes continue to dominate their professional sports. Nope, definitely no corruption of testing controls going on there.
I don't think Olympics is the right place to fight this issue. It's not fair to the other athletes. I don't even know if exemptions are a problem in skating specifically, they may not be. But I think it's definitely a problem in sports in general, and then all you need is for the Russians to feel they are being treated unfairly, and they are going to take what they feel like are appropriate reactions. I wish they didn't do it at the Olympics, fight in the offseason and then boycott if you are still not happy, but here we are.
They are also not innocent. They got away with cheating in 2014 and since they got away with it, then they push too far and now they are the guilty one. It's all so tiring. I'm sad for the other athletes, Kamila should not skate, but in the offseason, I hope everyone can reflect on what they can do differently to restore trust and work towards a more honest playing field, not just blame the bogeyman.