Or by "this" did you mean Tips -- i.e. is your argument that you shouldn't ask your users for discoverability advice? If so, I can see how doing so requires a bit of indifference to embarrassment, and a lack of care as to what snobs might think, but hey, discoverability is hard.
How would you design a way to teach users they can do queries like this?
Try this: Go to Google.com as a logged in user and try to "switch" to your new account. What was originally one click to logout and one click to bring up a un/pw now takes a ton of additional user interaction.
I'm no Jony Ive but whoever thought this was a good workflow needs to reconsider.
I tried to "switch" to my new account, as you described. It took about 10 seconds, which was the time it took to load a new page and type out my credentials. Furthermore, as soon as I did that, I could instantly switch between accounts with two clicks and without having to log out of either account. What's the problem?
This reminds me heavily of the IFTTT recipes (https://ifttt.com/recipes). Google has so many parts that sometimes you need a little guidance to see how they fit together in a useful way.