By this logic, everything is brilliant until it's not. That's not a good way to define "brilliant". Actions that eventually net undesirable consequences are stupid, not brilliant.
E.g. Being a petty armed bank robber isn't brilliant until you get caught.
> Actions that eventually net undesirable consequences are stupid, not brilliant.
I think it depends on how predictable the consequences are (it may be brilliant, or at least smart, to act in a way that offers a small possibility of an undesireable consequence in return for a large possibility of a highly desireable one), and on how long the time horizon is (it may be brilliant, or at least smart, to act in a way that offers certain undesireable consequences much later in return for certain desireable consequences for a long time before that). To overstate the objection, all actions eventually result in death, which is presumably undesireable.
E.g. Being a petty armed bank robber isn't brilliant until you get caught.