I know that some do great work that not the main problem it's the total lack of balance between the genders that creates major problems because if someone is too picky they may never find a partner to skate with.You can't force people do what they don't want to do, and the assumption that a single skater can just 'switch' to ice dance is false. It is about as laughable than the premises of multiple romance novels when they just take a hockey player and put him into a pair with a suffering FS girl and they win Olympics in 3 month. To be an ice dancer, a man needs to want to ice dance, and the younger they are when they start ice dancing together, the better. It is particularly evident in how much better siblings duos do in juniors.
There is a huge number of mixed nationality teams who do fabulous work without anything untoward happening. As for Desyatov, he is nice, tall lad, so the frozen fields of Ukraine it is after deportation.
With dance I can see some of what you say is true but in pairs has a lot of cross over skills between singles and pairs. If you have a young man that has everything but the quads and about 5'10 or taller why isn't pairs even brought up as an option for them. Every time I look they keep pulling girls out of singles to charge over and almost no boys are brought over. So it creates a situation where women have to fight over the few men that are in the discipline. When think some of the wonderful male skaters that would have been perfect fits. Wonderful spins, solid triple jumps, and good skating skills. What the harm of allowing them to explore the option? These men could have wonderful careers that last longer, many male pair skaters skate into their 30:s,then the singles ones because of the lower risk of injuries.
Also it seems that girls are getting younger in the partnered disciplines. It used be that in the partnered disciplines the skaters skewed older especially in dance where teams like Chock and Bates and their age were close to the norm. Now we have girls as young 18 being paired off dance to who ever their coach and her parents pick. The girl has to hope that they picked wisely because she may stuck with him for a long time. These international partnerships at such young ages create problems especially if the man is much older than girl in question which happens far too often for my comfort at this point. Bella an 18 year girl was encouraged most likely by her coaches to marry her partner within months of him coming over here so he could stay here apparently. Now what happens if he gets deported is she going follow him to Russia and for Russia once the ban is over. Outside of most likely not being able to compete in United States what to but top them from doing that. Nothing right now exists to stop this. I think a new rule needs to enacted which states you have 21 years old before you can form an international partnership for ISU skating competition. I know of stupid actions that 21 year olds engage in but at least they have some more life experiences to draw upon to stop being exploited by everyone else.