Interesting discussion, but not especially convincing.

You seem to be suggesting that, if we can't measure something, then it may not exist. We cannot measure how much we love someone, whether our joy is more intense than someone else's, or the relative levels of individuals' sexual desire. Yet we do not doubt the reality of love, joy, and sexual desire. The clue is in your use of the word 'directly'. We cannot directly measure these experiences, yet we do not doubt their reality. You then continue in a strange way: “The magnetic FIELD in between is REAL by virtue of the forces it creates...” This seems somewhat strange in an article suggesting the non-existence of [quantum] fields. Perhaps we can also deduce the reality of quantum fields by noticing their effects.

You may be right, but you are certainly going against the trend. Even in 1989 the physicist Paul Davies said that the traditional approach based on the particle concept had been replaced in physics by that of fields (The Cosmic Blueprint, p105). So for him the matter was already settled. And I would have to agree.