>>I could have easily been 10x more productive if I didn't have to endure four hour sprint planning meetings
I completely understand this feeling. The problem is so plain and simple. There are teams that win because of heroics, they achieve something big. Those management types who lack the chops to be heroes simply try to turn heroics in a process.
So what they basically do is, watch a team win. Instead of realizing its the interesting/challenging nature of work combined with things like lesser distractions, strong deadlines and well aligned monetary incentives that count, they rater look into common set of patterns that they would do. The net result is they end with a really boring process.
If you think to be successful you have to do X, Y and Z steps you are doing it wrong. X, Y and Z are catalysts, enablers or at most methods to keep you sane while you pursue a higher purpose.
My latest irritation is manager types getting too obsessed with Unit testing, it reminds of XML and the way it was abused.