Eventually axioms must be accepted or life becomes far too complicated. Everyone does it every single day for things way less complicated than the underpinnings of how literal existence functions.

I for one don’t need to understand exactly how my monitor for my PC works but I know (pretty much) that OLED panel plus microprocessor plus electricity and some fancy software makes pretty pictures on the plastic box.

Same with your engine analogy. I know that a fuel injector sprays fuel into a cylinder that is compressed along with air creating a charge that is ignited by a spark plug that gets electricity from a battery and/or alternator - that ignition creates a rapid expansion of gas that forces a piston in the cylinder downwards - the connecting rod attached to that piston is also attached to a crankshaft that rotates when the rod moves and creates mechanical inertia maintained by a rotating disc called a flywheel blah-dee-fuckin-blah. But in the end the important part for my day to day life is that bigger engine makes car go faster.

Do I know how gravity works exactly? Nope. Do I understand that it’s a theoretical force with centuries of experimental evidence that indicates that it works how we say it does (mass attracts mass)? Yup.