Predetermined? No. Predisposed to? Possibly, depending on genetics, prior experience, establishing operations (such as deprivation or hunger), risk to reward ratios, and tons of other conditions specific to an individual.
Predetermination is an absolutist term.
Agreed.
Learned behaviors ARE mimicked behaviors.
Goes back to the "How to become a successful plate spinner".
I agree with the "Fake it till you make it" (Mimick till its learned). However, if results are not actualized, the behavior will never be learned because CHANGE will not occur.
So the above statement is an incorrect ABSOLUTE.
You're completely missing the point. What you perceive as being disciplined is defined by what behavior is reinforced as being so. For example, if the 400lb guy was socially reinforced for being fat HE would be the idealization for discipline.
If hard work and fortitude did not get him there, he would not be considered disciplined in anyone's standards.
Sure it may be easier for him to take on 10K calories a day. However as a bodybuilder, you do know that even the skinny guy who practices high caloric intake trains his body to DESIRE more calories.
In this sense, the skinny guy who ACHIEVED the 400 lbs status is disciplined while the natural 400 lb guy is genetically blessed.