Yeah, the requirements for testers varies significantly by industry (which is why Glassdoor kind of breaks down if you try to look up salary information for them). In my industry, video games, the pay is depressingly low because of the huge amount of people who want to get their foot in the door of the industry*. If you look at salary aggregating sites like Glassdoor and search for "QA Tester," though, those usually also include software, chemical, and materials experts and engineers, who all command far, far, far higher salaries. A tester for, say, Konami, and a tester for Pepsi are not at all the same. Sadly, game testers are very easy to replace**.
*I don't know if I recommend this path, personally. It's extremely hard to "escape" QA, and precious few do it. It's even hard to move upward in the department, since there are so many overqualified testers and so few management positions. My first lead, who already had 10+ years of experience when I started in 2003, is still just a Senior Coordinator at his company. I ended leapfrogging him by quite a lot, but it was mostly from luck in choosing where to work.
**Good testers are not at all easy to replace. Good luck convincing top management of their value, though.
EDIT: I don't get Asian glow when I drink.