... until you send the next email to an @gmail.com address. Or open a page with AdWord ads on it. Or Google Analytics. Or Google-hosted JS libraries. Or Google-hosted fonts. Or an AMP page. Or...
Any ad blocker blocks their scripts, that's why its in my list below.
But if you don't see the difference, I can't explain it any better than I just did.
Is it really worth the effort if you have to conduct your online life like a spy in a foreign land?
Where any mis-config or 'you missed a step' could expose you.
Doesn't need to be, tons of people use G Suite. you'd have to be checking MX records.