We approximate. We add redundancies.
Rough enough is good enough.
Change a few words in Shakespeare, and it would still be Shakespeare.
Or put a few backup systems on our aircraft and space ships. We also add redundancies in our communication, you could remove a few words from Shakespeare and meaning would still remain (Except there might be a few ripples with words that he created). Same as greeting someone with a smile and nod of the head and a "Hello.", you could remove one or two and we could still communicate.
Approximating saves us time and redundancies give us backups in case of failure.
When that is not enough we tend to spin out of control, we become manic. Some obsess over cleaning their kitchen, some try to stockpile money against the vagaries of Fate. Both of these are attempts to draw a straight line.
Doomed to be imperfect, but in an imperfect world I guess it really doesn't matter that much which coping system you use.
Perhaps we could look at the work of Edward Lorenz for some comfort. Way back in 1961 he was fiddling with some math formulas for predicting weather, to save a little bit of time he approximated some figures. At first it started with a small divergence and then became quickly apparent that small changes lead to wild differences.
Which I find comforting.
It means we change the world with the smallest of our actions. That we matter.
We are all imperfect and only capable of chasing perfection, never achieving that perfect state, but at least we all matter.
And just perhaps it's being imperfect that gives us room to create.