Your thought process is a function of language which means your thinking is conditioned by your language and culture. If you can't think freely or independently of your culture,then how can you be free of all the mental and emotional prisons. Which are more effective than actual prisons due to their intangiblity.
Your example makes my point of deluding ourselves that we have choice by imagining situations in which we do. However you could argue that if I you believe you are free, than you are. Which is the appeal of religion and perhaps philosophy. You create some sense of control and order. In order to forget we are flying through space on a rock following a flaming ball of gas. At about 86,000 miles per hour.