My point is that you must decide which is your true priority, accept that you are sacrificing some performance in other areas, and do your best to keep the other areas/events as strong as you can. You can see the difference between a true rings specialist like Van Gelder or Rodrigues and a more all-around athlete like Yibing or Yovchev who specializes on the rings, but there is still a clear disparity between their rings ability and ability in other events.
You are comparing specialist in different apparatus, of course they are in disadvantage to each other. If you have ever done gymnastics, all six events, I'm sure you know it's probably the most difficult sport in the world. Chen Yibing has a great all around, just being among the 200 best gymnast in China makes him a great all arounder. China probably has around 400 elite gymnasts, never mind the others. The same goes for Jovtchev and Chechi. Yang Wei is not the only one, what about Hiroyuki Tomita.
And what do you mean by "you can see the difference between a true ring specialist like Van Gelder or Rodrigues and a more all-around athlete like Yibing or Jovtchev"??
I would not say there is a clear disparity between their rings ability and ability in other events. Take Vitaly Scherbo 1992 Olympics. Gold medalist all around, parallel bars, RINGS, pommel horse, vault, team final.