They might be interested in the Casino, but is the Casino interested in them? Wynn is not coming to town to be just another transit-accessible gin joint. There's just no overlap between high-rollers and people who think the T is the right conveyance to arrive and gamble in style.
In every way he can, Wynn is going to send the message that if you're coming to his Casino, you need to be a high-roller, or at least think of yourself as one. This is incompatible with "and then I'll take the T home". If you can't afford $20 for a cab home, he can't afford to waste a seat at the blackjack table on you.
If Wynn is doing things right, he'll be sending the vibe:Coming to the Casino is like The Prom, rent a limo with friends, or lose enough, and I'll send you home in my limo, the lowest demographic he'll target would lose some, share a cab home. (or, having lost it all, call a friend or walk a loooong way).
It is simply not a T Pass kinda destination.