The case was indeed fun to work with, but the main reason why it had such a fast and happy resolution was because the customer was very responsive and very cooperative.
I cannot talk for every Technical Solution Engineer, but I can tell you that I have no particular interest in simply closing a ticket: I want to go down the rabbit hole and solve technical issues, and I know many of my colleagues feel the same.
I am also far from being the most senior or skilled TSE in Google Cloud Support, I just wrote an article about one of most interesting cases I had.