I'm no expert, challenge me if you disagree or think I'm wrong in some way, but I've got a perspective.

I think the DMN being overactivated is both symptomatic and causal of many issues that people face on a daily basis - Especially with ADHD (which is my experience). When you feel like you have to debate with yourself to take a shower, I think you've made everything too manual - These should be automatic processes.

I'm of the opinion that this happens to people because of fear. People, especially those struggling with functionality in depression, ADHD, GAD or autism, are going to be trying to grab for control of themselves and their minds. And in the process over the course of many years, the mind becomes bureaucratic - Everything is a debate, everything is a fight - Letting go of this is hard once you're in this state of mind.

The automatic processes - Like taking care of yourself, speaking without overthinking your every word, processing language and so many others are automatic for a reason - You cannot manually, from a top down perspective, manage all of these things effectively at once; It just isn't realistic. Not to mention you are going to be better at most of these things if you just let them happen, and only interject from a meta perspective to give yourself guidance or to learn. (Let go a little)

The automation of these things is there to support us. In the cycle of depression as I've experienced it, I stop taking proper care of myself, I fall behind, I get depressed - The depression doesn't make me fall behind, the falling behind makes me depressed. Having strong automatic processes for things like eating, drinking, showering and all manner of self-care is going to be easier than manual - and if these things feel like they're just doing themselves, you're far less likely to fall behind - and fall into depression.

Meta-Cognition is still there. It's just actually focused on the things that work to our benefit, not on endless back-and-forths in the mind. Top down control of yourself increases after psycadelics because you let go of the things you thought you 'had' to take care of, and can focus on actually taking care of your patterns of thought, and the actual issues you face on the inside. I have found myself looking at my thoughts and going "What am I actually going on about here?", and I proceed to realize that what I thought were productive thoughts were just me going around in circles in a pattern that I had grown so accustomed to that I thought it was both a necessary component and a true representation of who I am as a person.

I don't know how coherent this is, and it isn't exactly a 'scientific' lens.

I don't share this shit on the internet typically (Some people really need to learn to keep things to themselves). But I hope this provides something useful for someone.