What kind of explanation would you like to see? We link to the repo and the Privacy explainer at the bottom of the page. Why is it important to you to know that it’s made by Googlers?
because rightly or wrongly, people are starting to distrust big tech companies.
It's open source. Please take a look for anything you might distrust.
Working for a big tech company doesn't mean you represent them in everything you do in your off-hours.
What are they going to do, watermark all of your images with subliminal messages about never using Bing?