It's just more efficient now to grab the same starter email that you then customize. Admittedly, google shouldn't be pretending otherwise, either. But what they also did was make it so you can get the starter email without having to see their ads.
Edited to add: I think a better argument on this could he made about the "draft a thank you note to the team" example they give in the video. That's more the type of thing that should be personal and probably not from a starter template, googled or AI-generated. https://www.youtube.com/watch?v=6DaJVZBXETE But even here, the reality is people were googling for these starter emails already.