On the rest, if you believe that, then you must have been absent for the other million times when an individual was thrown into the garbage bin by Google, and told "you did something wrong (maybe), but we won't tell you what, nor will we ever respond to you again."
> It just hails quality over making a buck, shown by banning ads on websites that do not conform to the quality guidelines.
While this is not true for every category, in my personal experience and in many reported other cases that analysed the traffic sent by Adwords' "partner network" (that Google derives a large part of their profits from) is half made up of auto-generated sites, links farms, and automated fraud clicks, and has been so for the last decade. This, and other shenanigans (like the 500MM pill ad settlement) goes against what you are claiming.
> Which other search engine has an active webmaster forum, webmaster education and webmaster tools? Which other search engine warns you about spam or technical problems on your sites?
Bing has many of those.