Kapor Capital has a strong focus on social impact companies that benefit the disadvantaged.[1]
Travis is a phenomenal salesman and fundraiser. Travis convinced Kapor that, amongst other things, Uber was a platform for democratizing transportation, citing things like racism amongst taxi cabs to spin Uber as social good.
So now you have a company that isn't actually what it pitched itself to be. For many investors, hyper-growth and skyrocketing valuation will wipe out other concerns around culture, impact, etc.
The Kapors are showing (awesomely, in my personal opinion) that they are serious about their social mission. They're doing what they can to influence a portfolio company to live up to their expectations. Travis probably doesn't like that—it sucks to be called out!—but that's why you take investment based on aligned interests and not just awesome salesmanship.