Just because a profession is challenging or time-consuming does not mean the pay will be commensurate. Those little Wordpress sites are often responsible for significant amounts of small business revenue and the people who keep them running smoothly are paid accordingly.

If you want to get paid more, find a position where your work has a direct and measurable impact on revenue or profit and your compensation will flourish. And if you're already doing that without the pay, then it's time to find a new employer.