You are putting all of your emphasis on "intent", as opposed to "effect". Regardless of what the intent of the Unrivaled investors or players is or was, it is likely that the effect is to allow the players to develop their skills in a way which will benefit their WNBA careers. Moreover, they can do this without going overseas or otherwise disrupting their lives with respect to child care, housing, and similar issues.
I think the "intent" of the players who were the driving force behind the creation of Unrivaled was to make overseas winter play unnecessary by replacing the most of income that it provides, but also affording more palatable lifestyle choices for them. It is a great deal for the players as long as it lasts. The question is whether it is financially viable in the long run for investors. I am not aware of any data yet that shows the financial performance (or lack thereof) of Unrivaled in its first year, but that will be the critical question in the next few months.