Then I ask, why is there a need for all the drama from the Bitcoin Unlimited supporters since the miners will decide what is final anyway?
Maybe, they are just sowing the seeds of discord between miners?
Whatever they mean to do, it is not working. Right from the beginning the miners already know which "side" to support. To what reasons why they decided to pick a "side" is arguable. It may be politics, their earn or the safety and the well being of Bitcoin as a whole. So I do think in the end they will be supporting core all the way.
This is highly debatable
What you say basically comes down to claiming that people are stubborn in their choice and won't change their mind no matter what arguments and reasons are put forward. Yes, there are a lot of such people around us. But I'm still inclined to think that miners, just like other businessmen, are more oriented on maximizing their profits (and that's good) than on defending their views or choice even if it is proven to be wrong or just less profitable. Consequently, I see no reason why they might not want to change their stance if they see more profits ahead thanks to a competing approach