What I love about learning a topic thoroughly is that I can then pick apart the "expert wisdom" into what actually matters. That usually results in me getting better but very pragmatic results.

Coffee is a great example, I worked through the whole stack, tried everything I had access to until eventually I weeded out what matters most to me.

Good beans, good milk, and just enough prep. I tried no prep, all the prep, and then just enough prep. Good beans not perfect beans. Good milk but whatever is available.

I do the same with everything, cars, bicycles, sim racing equipment, computers, software etc.