Automatic is good. Automatic is bad.
Depends on how it's conceived.
TFW you hop from rock to rock across a creek. You can't think too much or else you'll fall in. You have to go with your automatic movement cascade, and automatic works. It's miraculous!
When your automatic does not fit the situation at hand, you've got problems. What's a good example of this?
Maybe your back gets into an automatic shape because you sit all the time. You create the best auto-sit you know how, given the requirements of school or work. Then you try to bend your back in some other direction, and the auto-sit can't give way to the novel-bend.
It's important to have ways to reconfigure automatic. For human's there is a particular feeling when 'working under the hood.' It feels like being a child, messy, wondrous, and exhilarating. Potentially scary, depending on how your childhood was.
Automatic works best when you know how to go in and tinker with it. You will have a much better life if you know how to influence the automatic. There are lots of strategies for this. #feldenkrais is the one I got sucked into.
Stress is not conducive to changing automatic. When you have to learn something new under pressure or threat, you end up creating automatics that are good enough for survival but not as good as they could be.
Poorly conceived automatics get you through a challenging-now but lead to problems down the road, because you learned them as 'the only choice I have.'
Richly conceived automatics are a joy to revisit and optimize as the years go by, because you enjoyed learning them, and you'll enjoy unlearning them and relearning them.