OK. Here's the scoop on how the Big East was formed, courtesy of Wikipedia (
Big East Conference (1979–2013) - Wikipedia, the free encyclopedia):
"The Big East often referred to as the Classic Big East was founded in 1979 after new NCAA basketball scheduling requirements caused the athletic directors of independent schools Providence, St. John's, Georgetown, and Syracuse to discuss the creation of a conference centered in the Northeast.[6] Other schools invited were Seton Hall, Connecticut, Holy Cross, Rutgers, and Boston College, with Rutgers and Holy Cross declining to join.[6] Villanova joined a year later in 1980[7] and Pittsburgh joined in 1982.[8] Before the formation of the conference, many of these schools participated in the ECAC Men's Basketball Tournament in order to receive an automatic bid for the NCAA Men's Division I Basketball Championship."
So these original schools were either independent, or members of the ECAC, which was hardly a conference. Then:
"About a decade after the conference's inception, Big East members decided to become a major football conference and thus added five schools including Rutgers, Miami, Temple, Virginia Tech, and West Virginia. The inaugural Big East football season launched in 1991.[10] West Virginia and Rutgers joined the Big East as full members in 1995,[11] and Virginia Tech joined as a full member in 2000.[12] Temple remained a football-only member until 2004, when it was voted out of the conference due to poor attendance figures, lack of playing success, and inadequate facilities.[13] The Big East offered Notre Dame a non-football membership effective 1995.[14]"
Then it began to collapse. Boise State applied for membership, etc. Miami left for the ACC. And so it goes.
But the original Big East, the original basketball conference, went back more than three decades, and it wasn't formed by cherry-picking colleges from power conferences. And it is those original conference members whose women's basketball teams are still superb, and contending for championships in several conferences today.