I didn't downvote you, but I really don't understand your point at all. Are you claiming that your email is completely impersonal and you don't care who reads it, but your search queries are deeply intimate?
The claim that you are replying to is not that they are getting the exact same information anyway, it's that they are still getting personal information and machines, not people, are seeing it and showing you ads/search results.
I was replying to myself, hoping to get the attention of whoever did downvote me. I did not believe it was you, since you sound like a reasonable person. I apologize if I didn't make that clear.
I also agree with this claim. I still understood the original post as "if they can read your e-mail, they know what you've been searching for anyway". This is simply not true.
The claim that you are replying to is not that they are getting the exact same information anyway, it's that they are still getting personal information and machines, not people, are seeing it and showing you ads/search results.