In discus throwing...
How can being the best to throw a plate in anyway compare to what Pogacar does?
I guess winning monuments had become old news.
Among many other things Čeh became world champion, won Diamond League and finished second at the European championship. Considering athletics is the Queen of Sport i feel that it bodes well with cycling. Hence Pogi needed to win the Tour or become world champion, to beat Čeh. Something was hence missing, compared to achievements of Čeh.
P.S. Dončić didn't win yet. He likely only needs to become a NBA champion for that.