Nearly anyone can be a pilot, doctor, realtor, lawyer ect.. it's not about who has the potential, it's about who spent the time and effort to actually be. We get paid more than a McDonald's worker because it takes multiple years of training, jumping through hoops, and putting in time/effort to do our job. We get paid becuase what we do has real value in the world. We get paid becuase we hold a large amount of responsibility when we plug in, messing up can mean anywhere from wasting a few hundred bucks in gas to hundreds of people's lives.
I also actually disagree that anyone could do this job, well maybe a better way to put that is we shouldn't let just anyone do this job. We do need a high standards, people fail for a reason in most cases.
What I think gets people confused about is this job really doesn't need prerequisites, you don't need someone to have a college degree or previous work experience. You can apply with a high-school degree, but that doesn't mean just anyone can do the job. You have to apply, make it through academy, and then spend years training at each seperate facility you go to. Many fail during those steps, and rightfully so. That time/effort is what makes us Profesional controllers and is why we are paid well enough. We are replaceable... but it takes many years and many applicants to do so.
Edit: thankfully for most of us spelling and grammar are not super useful to a controller.