Self-Awareness VS The Flow

This question is much more psychological than technical, but it makes a big difference while choosing between different learning methods.

Why self-awareness: many people are stuck at their current level when they now feel ''comfortable'' using a certain language. They keep making the same grammar mistakes (eg, ''at' vs ''in'', ''would do something'' vs '' would have done something''), mispronuncing the same words (eg, price vs prize, boss vs bus), and probably speaking with the same accent. If you are not aware of what's missing, you probably just can't fix it without any intentioanl practice, as you're repeating the wrong patterns, which may sound harmlessly awkward to the native ear but still comprehensible. In order to make progress, self-awareness helps to understand where you can still work on and guides you to more deliberate practice.

Why the flow: here's the catch. Language learning isn't math. You just cannot expect to speak your (TL) perfectly by studying the grammar rules, memorizing vocabulary words, and simply applying them in a real life conversation. It takes the brain lots of time to get used to the new language, and more often than not, it happens subconsciously. I mean it in the sense that, you don't memorize a joke and analyze how funny it is. You simply laugh out loud. That's why immersion works. You just go with the flow, listening to it, reading it and living in it. Also, sometimes I realize I speak more fluently and even my friends temporarily forget I'm a foreigner when we are drinking at the bar. I'm not thinking about grammar or how to perform well, I'm in the ''flow''.

Now my question for advanced foreign language learners/users here, which one do you think serves slightly more? I know both are important, but where to get the balance?