Why is the “Free Market” vouched as the true form of market economics?

I’ve been reading, listening and studying finance and economics for about 5 years through schooling and self-learning. I have degrees in accounting, econ and pursuing additional education in International Relations.

Yet, I can’t understand the ever-lasting quest to reach a “free-er” market. What about a free market makes it natural, true to its form? I know it might seem like a naive question coming from someone with an education in the matter.

I am not looking for a definition of economic schools of thought. I’m asking why is the natural form economics so sought after? And on what basis is the free market the natural form of market economics?

I’m hoping this sub can provide me a good explanation.