To take your analogy further, some people just don't stop to consider numbers in the first place. What makes up a number? Why are numbers numbers? If you understand all the aspects of say 5, does that mean that other numbers are lesser numbers? Does it change other numbers? Should those numbers question why they are numbers? No. Some numbers are prime. Some numbers can be factored. Some numbers are imaginary, negative, positive, rational, irrational, and all sorts of things in between. They're still numbers. If we only had one kind of number, we couldn't do many of the things we do now nor would we have many of the things we have now because numbers make up math and math is the language of science.
(no subject)
All numbers are useful and we need them all.