No question. I'm in complete agreement that the watch can be a more convenient way to get notifications than the phone, depending on the circumstances. However, that's not the point of discussion with this particular commercial. The choice of a couple interrupting an intimate moment to respond to a notification that really didn't need to be acknowledged, made the watch appear to be more of a distracting intrusion than a convenience.
People love to beat strawmen around here, but the fact is that commercial shows the watch being a distraction, rather than a convenience, regardless if you think the watch is more convenient in general for such things. At issue are the circumstances depicted in the commercial. Something like a woman waiting at a curb, her arms full of bags, and getting a notification which only requires her to flick her wrist. Not sure why she even had to dismiss the notification, or why we needed to see that to get the point across. It also makes no sense that the Uber alert is telling her that the car is 'arriving now', but the caption tells us to 'take our time'. It's just the wrong commercial to showcase that feature.