my day job is like brushing my teeth

Think of your day job like brushing your teeth. You might not get real satisfaction from the act of it. It’s just something you do. But because you do it consistently and without question, you are able to enjoy the things that do bring you satisfaction. For your oral health, that might mean benefitting from the pleasures of food and drink without the agony of a rotting mouth. For your day job, that might mean the freedom to create and build your passions without the fear and weight of not being able to pay your bills.

You do not have existential crises when you think about the time spent brushing your teeth not contributing to a life of meaning. Don’t overthink your day job too much.

Just a thought.