No, the members of the council have to balance possible benefits against possible risks. We know some of the risks - relegation, reduction in Sky money, recession because of Brexit, trade wars or even real wars, and risks we don't know about yet.
The Council will have to borrow £280m at 2.6% and pay back around £380m or £15 million a year. The debt is the Council's debt. If the club fails to pay the Council has to pay the debt even if the club goes out of existence. (Heaven forbid.) The Council might even have to cut services as the debt must be paid off.
It's a risk for the Council.
People can't see this.
We will have council members who don't follow football but will ask why a council has to be guarantor to a billionaire who owns a football club in a multi billion pound industry.