Trying to understand students who seek perfection

Let’s talk about ‘perfection’. I’ve never understood it and never really understood people who chase it. Does it exist? 

Sure it does. Mathematics is perfect. Science is, too (flat-earthers look away now). If you burnt all the books written about those topics and started from scratch, testing and experimenting as you normally do when investigating a hypothesis, you would get the same results you had once lost. 

But, can people be perfect? Can the things we want to achieve and ‘do’ in life, like speaking in another language, be perfect?