Being an MBA doesn't change whether or not you can sell something though. Anyone can equally be good at selling things, its more of a personality type if anything

I don't see the purpose of MBAs unless you are doing high level management at a mid-large company, and you are supplementing it with other (core) skills such as software development. The other reason you would take an MBA is if you want an equivalent knowledge set of a bachelors business degree without having formal training.

I think the MBA hate is warranted to some degree, because you see far too many people taking an MBA as a "backup" option. I've dealt with way too many people with MBA degrees that have no idea what they are talking about.

I'm a strong believer that business skills need to be won by hard-earned experience.