If those pro teams didn't bring in the money via tv contracts, the players wouldn't get paid what they get paid. I agree that taxpayers bankrolling stadiums and arenas for billionaires is corporate welfare, but let's not bullshit... If large audiences didn't tune in to see the games, the players wouldn't get paid what they get paid. ...and nobody tuning in to see WNBA games means that the money isn't there to pay the players what they want to get paid.
If a cities bankrolled an arena for each WNBA team (their own arena, not them sharing with an NBA teams), and nobody filled the arenas on gamedays and no networks were willing to pay billions to air the games because they know that they couldn't get the advertising revenue to make the tv contract worth it; how long would that work out? I hope they (WNBA) can manage to grow their audience, but 25 years in, how many people can name 30 WNBA players, past and/or current, without going to their phone? Almost nobody...