So they have a stake, that has nothing to do with the fact they have no control of the external forces at play.
So, for example, a popular combo wants to do a 5 night residency for an autumn tour. The promoter approaches the venue for availability, do City pressure the venue board to not book tickets 6 months in advance on a Saturday because we may be at home, not Sunday or Monday if Sky decide to put us on TV. You can't have Tuesday or Wednesday/Thursday because we may be in European competition and Friday is a risk as some games are on Friday in the new TV deal. So any concerts have to be between the end of May and the 2nd weekend in August or on an international break week. Seems like a sound business plan.
As the venue is looking at 200ish events next year we just need to get used to it, because neither is going to take the other into consideration.