Forget Reuvain. Can Shimon commit a capital crime (resulting in his execution) if it’s not his time? Can he commit suicide if it’s not “his time?”
Yes. The question is strengthened if we involve others. Bechira will allow you to not get what you would have otherwise, but will it do the same for others*?
* Yes, others could include children and spouses. But let’s assume that indirect punishments will get tallied up in the “Schar V’onesh” calculator and used elsewhere.