> they can't be bothered to write more than 1 character

You try handwriting all of your code and let's see how long until you start abbreviating everything.

Mathematical notation is all abbreviations. We used to write mathematics without abbreviations. It was absolutely horrid. Try reading some 13th century mathematics, translated to your language (e.g. Fibonacci https://archive.org/details/laurence-sigler-fibonaccis-liber... ), and see how much of it you understand without the benefit of symbolic notation. We would even write aaa instead of a^3.

The point with mathematical notation is that it can all be sounded out and it's extremely general and abstract. Generally, x is not a measurement, a quantity with a unit, a meaningful anything. It's just a number, and x is a better name than front_server_count or whatever thing you're programming about.