He does know that he is an actor, right? I don't understand these types of stances when your profession is acting, which is an art form. If the role calls for it. Why not do it? Alan Ritchson is around the same as Jared and also has kids, but no hang ups when it comes nudity. Why? He is able to separate the job from his personal life.
This is why producers like to hire British actors and those who graduate from elite acting schools. They usually have no hang ups when it comes to "acting" and will support whatever the script demands from them. Now some for example do take it to the extreme and will actually lose extreme weight to provide authenticity to a role lol. But they just love the art of acting and so fame and fortune is just a bonus for them.