Google was already in the middle of a class-action lawsuit regarding the incognito mode, where they were accused of tracking user activity. And, they agreed to settle the lawsuit.
To conclude that and move on, they will have to make the necessary changes to prevent another lawsuit against them.
Yeah, I have been wondering my whole life that there are so many people believing in ‘privacy tools’ by companies like Google. This is one of the things that mystifies me most.