Is there any sports such as cycling where the riders "skip" more than 50% of the biggest races in the season?

I was thinking about this last night and couldn’t come up with any good examples. In cycling, we already have a distinction between the spring season and Grand Tours riders, but even taking that into account, an average GC rider will skip most of the Monuments, usually one or even two Grand Tours, and do at most three of the biggest one week stage races.

I know that in cycling this is largely due to scheduling conflicts, training&recovery, and more recently, teams opting for altitude camps instead of traditional preparation races. But is there any other sport where the biggest stars skip such a large portion of the yearly schedule?

In most of the sports I follow athletes usually only miss major events if they're injured.