For the 100th time, selling seats is not Morrissey's concern. That is the job of the promoter of the show.
Morrissey has agreed to perform a concert at these venues. He will be paid his sum for doing so by the promoter, and Morrissey will in turn pay will his band/crew/management as agreed.
As for selling seats and making a profit over-and-above whatever Morrissey, Inc. was paid and the cost of the venue rental... well that is the promoter's worry.
This is how it works, people. Whether the venue is 50%, 70%, or 97% full, Morrissey is paid then same. And when the lights go down, he can see roughly the first 15 'rows' under most lighting configurations so it makes no difference to him.