Using the "Why is X" Google autosuggest as proof is meaningless, no one searches for "why is gmail so great" and the same suggestions come up for all popular products and services.
I do the same check for "why is fastmail" and get "why is fastmail down" - I suppose slow is better than down.
http://slatestarcodex.com/2013/04/04/lies-damned-lies-and-fa...
No, you are seeing a reflection of what other people are searching too. It's a mirror into peoples private naughty thoughts. Stuff they wouldn't say themselves, yet they search for to see if there are arguments supporting the thought.
Yes. Much more useful that way. They want to auto-suggest what is the most likely search, not what is the most likely content.