Didn't Karpov himself say that he expected to lose the 1975 match, and then he expected to beat Fischer
Karpov said the same thing about himself losing to Spassky in the candidates match leading up to the world championship in 1975...then he proceeded to trounce him! I believe Karpov said Spassky would easily beat him then go on to face Fischer in 1975; instead Karpov won convincingly with a score of +4 -1 =6. So, just because Karpov gave better chances to Fischer winning in 75' doesn't mean he would win. Truth is, Karpov was improving rapidly at this time.
Maurice Ashley is extending that further and making even patzers rich!