I reckon we are so incredibly complex, are integrating so much information that from inside it's hard to see if you're deciding or selecting by rule your preferred path given what you know

You can call the complexity free will, we're all so different having had different parents, different childhood experiences, different education, different opportunities so each has their own solution that rises to the top in any situation

But also brain scans have demonstrated that for minor stuff (like raising your hand) action precedes "deciding" to take the action.