Back in time people were oblivious to the knowledge of the "subconscious", it became slowly but surely something that nowadays is being widely considered and has impacts on how humans think of each other.
To be(come) aware of a problem, is both a result of the many as well as the individual over time. "Over time", I think, is to be considered in the slow changes how man thinks about himself.

From how I see it, the slow changes are not to be compared to straightforward problem solving attempts but something where the will to change is confronted with the will to preserve. Where those two different attitudes meet each other, sudden change measurements are being slowed down or even sabotaged (either consciously or unconsciously).

I agree that you cannot solve the problem "who observes the observer?" but the awareness that this is so, might be something which will enter common knowledge, maybe long after you and I have died.

I've heard somewhere the the state of the art/contemporary scientific practice is back in time (like fifty years or so). People who were and are ahead of their times, were not necessarily witnesses of what they wished for to change; or; I would say to be discussed and debated. They set the ground and from there, they had to trust and rely on those coming after them.

Once you start thinking about it in detail, particularly at the statistical level, then you realize the enormity of controlling the role of the observer.

But just imagine the complexity of any given experiment in which human participants are involved.

I do that all the times. I also would not limit it to the humanities but also to the natural sciences. In particular there, where the notion might be strong that there is no need to search for biases.
In my mind, all those thinkable variables pop up. Didn't you notice? ;-)

In my former blog posts was not tired to mention Heinz von Förster (and others), who was concerned with this very problem. You never told me, if you heard of him or read his publications.

So now we are two who have given this issue a lot of thought :)

I would like you to read this article of mine, in order to shorten our attempts of explanations in which way and on what our knowledge might be based on:

@erh.germany/truth-is-a-liar-s-invention-a-reading-for-happy-skepticism