Yeah, Paolo Bettini is another case in point : after a stellar 2004 season in the Classic and stage races - he decided to do the TDF for his team.
He finished 58th overall but his job - as he said himself - was to help his team in the TDF.
He's a real cyclist - not a three week one.
I pity the younger fans because this type of rider was commonplace when I was a youngster in the 1980's.
Guys like Sean kelly, LeMond, Hinault, Anderson, Delgado, Fignon would ride all season no matter what the terrain or event.