Can you prove Betts wouldn't have become an AA at Stanford if she stayed?
Also, UCLA has had AA before. I don't know if you meant 1st team specifically. Michaela Onyenwere, Jordin Canada and Maylana Martin have all made AP AA teams, although none 1st team it appears.
Going back in history, Ann Meyers was a 4 time WBCA All American and Denise Curry was 3 time. Maylana Martina and Natalie Williams also made WBCA AA teams.
The argument could be made that on,ly those named as the 1st team All American are the true All Americans.
The 2nd & 3rd team All Americans are considered to be 2nd & 3rd best based on a point rating system that led to their selection.
The 1st team All Americans are allowed to keep their 1st team status silent while the 2nd & 3rd team players should qualify their status with the 2nd or 3rd team moniker that indicates that they're 2nd or 3rd best and not 1st best as if to make it appear that they're the top shelf AA players when they're not.
The true All Americans are #1-#5, the rest are either #6 -#10 or #11 - #15.
Thus IMO those players named are either an All American, or a 2nd or 3rd team All American.
That's why Betts is UCLA's 1st All American as the article indicated.
If you don't agree like Betts being UCLA's 1st All American then take it up with the author of the article.
According to Google AI,
"In the context of sports, a "2nd team All-American" designation means an athlete is recognized as one of the top performers in their sport, but not among the absolute best, as indicated by the first-team selections."
Should there be 4th. 5th & 6th team All Amercans too so everyone can then be call an All American?
Of course not, only the best are the best & are so named "The All Americans" (1st team being silent).