What they are really saying is, "I don't want to be in the Senate", "I don't want to go to work here every day" and "I don't really want to run for President."
We don't have an adult political system. What we do have is a political system in which childish tactics are used to play childish games with adult consequences. As described by Dr. Berne in Games People Play, "games" are dysfunctional strategies that can be used by adults to elicit childish or parental responses. Childish strategies shift responsibility to the "parent" while still claiming power. An adult who acts like a child gets to control what happens without being responsible for it.
(This article uses a very loose adaptation of Berne's Games People Play as a model.)
When the left shifted from a worker's movement to a youth movement because dissatisfaction was more likely to be found in the children of the middle and upper classes than among workers, protest strategies often became childish. The classic protesters were self-consciously juvenile outraging sensibilities so to force their establishment opponents to play the role of the sanctimonious parent while they reveled in being the liberated children. "Outrage" is a game that children learn to play at an early age. Some adults never stop playing it, at parties or at family reunions.
