I don't understand a lot about how the computer in front of me works (ok, I know more than the average person, but still I don't know a whole lot). Yet I'm stil

I don't understand a lot about how the computer in front of me works (ok, I know more than the average person, but still I don't know a whole lot). Yet I'm still able to use it. We understand enough of the effects gravity to describe most phenomena that are relevant for most other parts of science. From my lay understanding what physicists are missing is how to tie in gravity with all the other theories they believe are true. However the effects, whatever they are, are so small that we can in most cases just ignore them.