For me, as primarily a backend dev, the argument was that it's a framework, unlike React, so you get an everything-in-one solution which is quite easy to setup and use.

Given that Google still hasn't killed this one yet, it's also a mature platform with plenty of articles online on how to use it.

IIRC the license was also better than React's, at least last time I checked.

Not sure on what the landscape looks like today, but when I was making the choice, the internet didn't seem to consider other solutions to be competitive with either React or Angular.