Why would anyone want to study and have years of experience in boring-ass jobs like QA, BI,specific enterprise applications consultant(e.g SAP/Salesforce), PC technician, helpdesk, integrator or sales.

I understand people who lack experience in more sexy stuff and have no choice, or do this temporarily. But I met some people who do it for years out of their own will. Why? There are far more interesting jobs in the tech world.