You can't compare one person's 30's to another's 30's but it has nothing to do it with the official system. Poineering Chinese skaters went through poverty and personal hardships in their long journey to competition success. Yao Bin had to fight for government money to establish his Pairs program, leaving teenaged P/T behind on their own without a coach for 5 years while he trained S/Z. Even today, Chinese fans often question if it is a matter of money that promising Chinese skaters don't get to go overseas for top choreography. OTOH many in the West often question the psychological impact of young athletes being away from their families.
In the West, federations pay different degrees of attention and support to different skaters too. The less talented, or what you call those who don't get to the top, are left to their own devices also.
There are pros and cons in all systems at various times. I'd rather credit individuals for their success and personal health, which can be achieved or abandoned in any system.
Whey they prepared for Olympics, the federation got a top therapist from America (or maybe Canada). Together with other therapists, they would give them same hours of treatment as training every day. Individuals health, I think, has more to do with the system.