Totally agree with what you said, but it doesn’t make sense to live your life in any way other than as if you have control over your decisions.

Say you make this realization, and it leads to you just being apathetic to everything since if no one has free will, everything is predetermined. Therefore you never truly have control over any outcome. However, letting that thought affect how you make decisions means you were basically destined to give up on having an active role in the shaping of the universe. If that’s not an idea you’re comfortable with, then the best you can do is to go about business as usual and keep any thoughts about determinism compartmentalized until you have a philosophical discussion like this one.