What you say is all true and I actually completely agree with you (and like how you articulate those points – great to read it distilled that way) but at the same time probably not a good idea at all to do in most circumstances.

It is alright to decide that in certain cases you can act with imperfect information.

But to be clear, I actually think there may be situations where pouring a lot of effort into really understanding confusion is confusion. It‘s just very context dependent. (And I think you consistently underrate that progress you can make in understanding confusion or any other thing impacting conversion and use by using qualitative methods.)