Don't see how politics or "bickering over the pettiest feature like [...] what colour the chart should be" is what "deliver[ing] maximum business value" is about, as you put it.
It’s easy to understand why. The 15 minutes spent bickering over the color of a button will be far more likely to leave an impression and remembered vs the 90 mins spent on ordinary, necessary and useful discussions in the same meeting.
I'm sure it varies for people (which is why you're downplaying it), but for at least some of us, it is simply the truth, the reality we have to face every day we go to work.