I wouldn’t go quite that far. Although it is true that we have barely probed the sun’s processes, we have made many observations. A guess, or an educated guess based upon observations, is known in science as a hypothesis. This is a valid scientific concept against which additional observations or measurements can be compared. If this further investigation remains consistent with the hypothesis, then it can be upgraded to a theory. We rarely upgrade theories to laws, because laws are immutable, and we have learned from experience that even our theories can eventually be found to be incorrect. There have been multiple Nobel prizes in science for findings that later proved to be incorrect.

The same goes for solar observations and the resulting hypotheses and theories. In this case, science has worked. We discovered that what we had concluded from previous observations fails to explain more recent observations. This happens often in science and is how each field matures. Solar astrophysics is relatively new (and yet relatively old) and has proved difficult to investigate.

What few people understand is how little we really understand about the world around us. We have the law of gravity, but Einstein and others have shown that an even better model of gravity can help explain more recent observations. We also consider the speed of light to be a law, but what if we discover something that violates that law?

Science has learned to be skeptical of everything that we know to be true and right. We may not find a better explanation in our lifetimes, but it is always possible that we are wrong. When do we know that we are right? We never know. That is the real dirty secret of all of science, including astronomy. All we can ever know for sure is that we have yet to find out that our theory is wrong.
https://www.youtube.com/watch?v=EYPapE-3FRw (10 minutes: Feynman on Scientific Method)

M. Murcek: Those who are long time readers of my work know that I am a strong advocate in skepticism when it comes to scientific claims. You, however, appear to be taking that skepticism a bit too far, applying it wholesale to everything. By doing so it appears to blind you to real results, when they come in.

Ps. Falcon Heavy for the win!!

And in keeping with the norms of scientific progress, the more you look, the more you see.

Need better theories? Send more money.