Shakespeare himself a Catholic did he have an alternative motive for stopping King James and becoming a tyrannical leader who would seek to expose torture and kill Catholics and was he acting in self-interest protecting himself and his family
The Kings players who came before Shakespeare and did perform some plays about historical kings and queens of England but they won't basically political intrigues that just showed the facts of the battle them who won and who lost
Shakespeare is writing this play to convince King James that he has nothing to do with those who might plot against him and is wholly in favour of King James
This play is a way for Shakespeare to celebrate King James, show his brilliant ancestry, advise him on what kind of King he should be, and show his loyalty