No, I am not saying that. The words "true MBA" have the same amount of content to them as "a true kitchen sink": zero.
I say that people buy education for different reasons. Some get an MBA because they want to flash their CVs, have a cushy job, and avoid the strains of being original. Others get an MBA because they need the skills, the language, the professional network, and the confidence, that such degrees (at least from good universities) bring for a specific goal they want to accomplish, be that within an already established business or not.
Saying that those kind of mind sets (or only one of those mind sets) is strictly particular to a group of people, which made a certain academic choice is wrong.
In my professional experience, for example, I've met a lot more engineers who were absolutely useless from a business perspective, than I've met useless MBAs. Of course, this is because I've met way more engineers than MBAs.