Topper, I agree up to a point that freeing up the mind when you swing is huge if you can do it.
Unfortunatly, not everyone can.
Some people have to have at least 2 swing thoughts in their head at any one time, either wise they think they are not trying hard enough.
If I could just add a few things to your last sentence if I may?
As long as you arrive at the ball with the correct swing direction, angle of attack, club face square, enough speed and hitting the sweetspot, then you're winning.
Fortunately, you dont need to do all these pefectly to get the ball round the course in a decent score