Men's water polo to WCC I don'y know if Title IX is necessarily a bigger factor, but I'm sure it's significant, when deciding what new sports to offer, or which to consider cutting.
Remember that baseball, not football, was known for decades as "the national pastime". I imagine all the MW schools have a long history of a baseball program...probably sons following fathers and grandfathers playing in the program. That's a strong support system for continuing baseball. And, like here in Montana where we have our summer cabin, baseball is still extremely popular. Lots of the low-level minor leagues are located in Midwest and Great Plains towns, and there's lots of semipro or town teams. So it's imbedded in the culture here.
Soccer is still a newbie in many areas. While popular, it doesn't have the history or the generations of people who have played the game. Even in CA, where our 7th grade granddaughter plays for a strong Sacramento area club, many of the parents are totally new to the game. Being a longtime residents of Davis, that still always surprises us.
Here in NW Montana, soccer has become quite popular, mostly due to the sustained success of the Montana WSOC team, which is usually at or near the top of the Big Sky Conference. But it has in no way diminished the support for local minor league and semipro baseball teams. And neither Montana, nor Montana State sponsor baseball, though Montana does has softball.