In the mysterious zone between sleep and consciousness this morning I remembered that when I first got into cycling, (40+ years ago), there were two world championships; there was the official one-off race, already fully discussed, and the unofficial world championships called the Super Prestige Pernod.
https://en.wikipedia.org/wiki/Super_Prestige_Pernod
In the years from 1969, to its finish in 1987,
every winner of the competition won at least one Grand Tour at some point in their career, and the list of names is stellar:
Merckx (7 wins), Maertens (2), Moser (1), Hinault (4), Lemond (1), Kelly (3), Roche(1)
I think you would agree, Graham, that this is probably a list of the biggest stars from the 1969-87 period. It was a season-long competition, based on a lot of races, with ( I think I remember correctly) more points for more important races, with Grand Tours having the most.
The reason I have posted this is that Merckx, Maertens, Moser, Hinault, Lemond and Roche are on both lists; they won both season-long championships and one-off race championships. In other words, in cycling at least, you can't stop a top athlete from winning.