If it was an email saying, "You have a notification" and you have to manually log in to see it, then there's less chance of you clicking on a phishing attempt. Also, if there's any personal/private/sensitive information, this method makes it unavailable over email.
Just shooting from the hip. It could also just be laziness.
Exact text:
"Dear Google Workspace Administrator,
You have an important notification from Google Operations that requires your attention.
Sincerely, The Google Operations Team"
And then there is a clickable link: "Go to Alert Center"
This is the first time I have EVER heard of the Alert Center. So, I also assumed it was made up.
Yea better is to tell them to go login and provide no links.
[1]: https://blog.youtube/news-and-events/update-youtube-unlisted...
[2]: https://workspaceupdates.googleblog.com/2021/06/drive-file-l...
https://support.google.com/a/answer/10685032?hl=en
Could something have happened across their entire Zanzibar/ ACL infrastructure?