Exactly. Very little of what we do is "explicit thinking", because it's slow to have to develop and verbalise those arguments step by step. Most of it is "hunches" that we then retroactively justify if asked, and those retroactive justifications were demonstrated not to be trustworthy by Sperry's experiments. We don't even have evidence to suggest that humans can reliably introspect our past decisions, but we do have evidence to suggest we readily manufacture them.