[Steve Van Doorn]

said, "What is her reason?"

This is what Noem is supporting
https://www.defendtitleixnow.com/
The undersigned agree that Title IX needs to be protected, and we commit to working together to keep fairness in women’s sports.
We believe:
1) Only girls should play girls’ sports. Title IX was passed to protect fairness for women.
2) The federal government should enforce Title IX in a way that protects fairness for women’s sports, rather than misusing it in a way that undermines fairness.
3) The NCAA and other athletic sanctioning bodies should not take any adverse action against any state or school that acts to protect fairness for women.

It seems it's similar to the South Carolina Gov reaction which is to not change coed sports. I don't have an issue with that.

[Extremely Extreme Extremist]

This is what Noem is supporting https://www.defendtitleixnow.com/

That's simply a CYA. There's no strength of law behind it. It's the equivalent of supporting Right to Life after you vetoed a pro-life bill.