I hate to be defending Google on this, but their Incognito Mode repeatedly states that the only thing it does is hide your activity from users on your computer, and explicitly points out that web sites can still see your activity.
Assuming someone hasn't installed a key logger or OS tracker :(
The current result only makes sense if you appreciate how the technical details work together, and view Chrome and Analytics as independent entities - like if you're involved in tech. Take a step back and look at the high level combination of the two as one offering - Google offers to make you "incognito" and then actually does the exact opposite behind the scenes.
And like it or not the non jargonated users outnumber the jargon filled by many orders of magnitude, and they don't tend to react favorably when people talk out both sides of their mouth unless there id's something even more dire at stake.