There is absolutely no merit to moving servers to play in solo queue. There is zero redeeming reasons apart from MAYBE being on vacation and wanting to play, in that case just don't.

Wanna play with your friends? Go for it, unranked or party ranked queue don't matter to me, my solo only checkbox means we won't cross paths.

After you hit immortal, you've proven to be good enough at the game to warrant exploring regions and not grief.

The ONLY purpose you have to hop regions to solo queue is if you want to grief over a language barrier, or you want to "escape" your own server from griefers (hint, you're the griefer)

This isn't racism, period. Allowing region hopping solo only allows grieving behavior, there is no reason to do it otherwise.

PUBG had such a Chinese cheating problem that they straight up region locked China and the game became playable. That isn't racism. Do the same here, region lock every account for solo queue ranked until you hit immortal.