I think, more importantly, from your perspective, you can edit the comment before submitting. That is, you can evaluate prior to submission.

But, even if conscious thought is merely subconscious thought, that does not mean we have no free will. That would simply mean that our conscious decisions are derived by unconscious actions. But, based on the 'edit' ability, our deeply considered decisions (which may be argued to be the most important ones) are the ones that go through this feedback loop. We think about them, and those thoughts re-enter our brain to continue the processing. So, we are refining. This refining of prior thoughts is more closely related to conscious thought than any actual awareness of our thoughts.