I sat on both sides of the table for two years (coding my tech startup at night, while attending MBA and CS and Law classes during the day to fill skill gaps). The doer within me couldn't wait to go to hack sessions every weekend, just so I could feel sense of substance and normalcy while building things with other hackers. During weekdays I would watch one of my entrepreneurial MBA classmates writing articles for Forbes so her Startup could be promoted in the article footer. She beat everyone in the school's startup competition that year, because of the high traction numbers she could report.
I saw 3-4 extremely passionate software engineer classmates in the MBA program who pitched at every competition and never made sense to anyone but other hackers (until they came to the valley). On the other end, the seller MBAs were polished and hit their pitches right on the mark, winning cash with ideas that promptly went nowhere. Making great lemonade and getting many customers lined up to buy it are two different skills, and the investors look at the latter when they evaluate you for funding. That is why pairing both sides in teams helps.
It all made sense, when one of the finals for an MBA class required us to sell 5lbs of hot-chocolate mix (in any way shape or form) for 4 hours and compare profits with other teams for a grade. Some teams went the conventional route - one person making the drinks, another person screaming to the crowd with a poster. Those made anywhere between -$50 and $200. The drinks required heating, everyone on the same location, mixing tables, etc. Some interesting teams made cupcakes they could distribute to offices and sell at much higher margins. One of the teams organized a "hot chocolate" party (hot chocolate pool, hot chocolate pong, you name it) - charged $10-20 per entrance and got 100 classmates to join. These are the skills you need to look for in an MBA.
If you're making killer BBQ, a good MBA can blow smoke out to get you customers, make sure you're getting your beef cheaply, and you are not harassed by the rookie janitors, because they have productive things to do while you're tweaking the recipe. (the best way to avoid needing an MBA, is to build an app that sells itself and doesn't need people to grow)
The symptoms you are seeing come from many MBAs of varied skills flowing into the valley to try and blow smoke for something or to demonstrate their smoke-blowing skills for you (and books like "Newsjacking" which teach brute-force PR to the rookies, and sites like LinkedIn which struggles to keep people coming back daily so it hired smoke-blowers to generate "career oriented" content). To avoid it, I've just stopped sniffing the air while working day and night on my mind-blowing BBQ recipe.