I think you're missing the entire point of the new development to be honest.
It's the beginnings of a new destination which will be made up of City Square, the Etihad and the arena. This combination is levels above what Spurs have in place and will bring in far more visitors on non-stadium use days.
The new City Square (with restaurants & bars) will be open every single night for guests of the arena and those working in the area meaning it will attract thousands and thousands of individuals on a weekly basis. The development also includes a hotel and offices ensuring hundreds of people on site throughout the day as well. That's before we even go into the area's own bars and club which will be available for visitors to the campus.
You're so wrapped up in other clubs and being negative that you're actually overlooking that our offering is actually going to be better, and that's before the other buildings start going up in the years to come.
Bluemoon Rising.