Why would someone invite a google microphone into their home to snoop on them? Even though it hasn’t been revealed yet, google probably has a link directly to the NSA & CIA just like yahoo. Free isn’t really free.
There are good alternatives for Goggle! Duck Duck Go, Startpage, & Gofer do not record your private details.
For private & encrypted emails that Goggle won’t read (unless you write to someone on Goggle Mail Gmail) you can use Tutanotamail.com