What does having success in business and being able to lift heavy at the gym have in common? Both cause envious people to be upset that they are not currently doing as well as the person who built themselves up over a long period of time.
Those same envious people are unable to grasp the concept that the business owner and the swole guy took years of dedication and struggle before they got to the level they did. Rather, they just say that their success is unfair.
Yes, someone can just inherit an already successful business or cheat using steroids. But the envious ones will assume because they are either unwilling or unable to replicate the success they see in others, they assume it is impossible to do without cheating.
Ultimately, it shows they are unwilling to do the work themselves and would "cheat" themselves if they thought they could do so without negative consequences.