For context, I agree with you that understanding compilers is very important to a deep understanding of the tools used by programmers. Knowing how languages are implemented sheds light into why certain design decisions are made and why certain language features behave the way they do.

That said...

> Also, compilers is a basic core course you have to take to get a CS degree. How is something everyone has to learn elitist?

Not everyone is lucky enough to get a CS degree.

Some people come from backgrounds where CS was not in their worldview growing up. Or they were discouraged from pursuing CS despite the subject being interesting to them. Or they tried taking CS, but they had to deal with external factors that prevented them from continuing.

To discount these individuals from making meaningful contributions to a programming endeavor is short-sighted. Their particular experience may allow them to be better at implementing the correct solution, even if they are not as strong of a programmer. Or they may be a very fast learner, and given more time and mentorship, they will learn about compilers, but they can be strong contributors until then.