Belief system is whatever you decide to believe, as simple as that. Or, in the other side, whatever someone else tech you to believe in... we have a variety of options to choose from. Your "professional" occupation, mean that you, for whatever reason, dedicate your efforts specifically to something... depending on the values you have been exposed to.

I mean Would You Stop Working If You Won 1 M€ In The Lottery?

But the first question is, why in the world you'd play Lottery anyway? Because you believe you have a chance to win?

This is just becoming a rant 🤣... Think about everything you believe as true and assume, for just a little moment, that the opposite can be true too. The difference is made by the perspective you decide to take. Are you ready to unlearn everything someone else thought you? Why you are asking the question? if you aren't willing to do it anyway? Would the response make you feel better/worse?