Okay, so let's
"If your team is conducting ad hoc, informal tests with little guidance or planning, the quality of the end product can be severely jeopardized—negatively affecting your bottom line"
This nearly represents everything that is wrong with the ISTQB certification. The quality of the end product is not
But this next statement in their advertisement does represents everything that is wrong with the ISTQB certification
"The best way to be certain that you are providing customers with quality software is to make sure your team of testers is certified."
Really? I thought it was by providing something they value, usually something built to meet their wants and/or needs? If I all need to do is put a gold embossed sticker on it, then so be it. Here you go.
It is the ISTQB's role to support a single, universally accepted, international qualification scheme, aimed at software and system testing professionals, by providing the core syllabi and by setting guidelines for accreditation and examination for national boards
So, their mission is to create a certification scheme (their word, not mine) and provide the materials and exams for that certification. It is nothing less than a money making scheme, and it is right there in their mission statement. They do not care about quality or testing.