What makes you trust someone with WNBA experience more than someone with mid-major/P5 assistant experience?
Historically speaking, WNBA head coaches who've transitioned over to the collegiate level have largely struggled. I don't believe there is one success story.
Going through the wikipedia page:
(link) here are the ones I recognized who coached collegiately after coaching in the W and all struggled:
-Stephanie White (coached in WNBA finals, train wreck at Vanderbilt)
-Van Chancellor (4 WNBA championships, had one good season at LSU before it derailed
-Cynthia Cooper (1 WNBA season coaching, never found much success coaching collegiately)
-Suzie McConnell (former WNBA Coach of the Year with similar track record to Collen, 1 good season with 2 bad ones after, then collegiately only made 1 NCAA tournament in 11 years of coaching)