Joe, the point of this controlled study was to see whether non-coeliac gluten intolerance is "a thing", or an imagined condition (as you think).

You won't be able to see the programme, but the results show significant correlation between eating gluten and symptoms.
That doesn't mean by any means that everyone would benefit from removing gluten from their diet, and no-one is suggesting you should- if you have no intolerance there would be no point at all in you going to the inconvenience of changing your diet.

I am most surprised that I find myself in this group of gluten intolerant people- up to a couple of years ago I could (and did!) eat anything and everything.
The improvement I feel in my general wellbeing (lack of joint pain, no bloating) since removing gluten from my diet, means I'll stick to it- as will the vast majority of those who took part in the study.

Will you not be convinced by a scientific study?