Agreed -- Accessibility!
Blackouts are a very simplistic symbol of the root of the problem.
Blackouts are only necessary because nobody is going to hand you 50 million a year for the rights to broadcast your product unless those rights are exclusive. Once you grant exclusivity you are limiting accessibility and exclusivity is granted for $$$.
They are paying for 50 million market share and audience level which determines how much they can charge advertisers and cable companies. If you are eroding that market share through other offerings... you will be paid a lot less for the rights if paid at all. Exclusivity is a necessary evil in order to get the most money
I don't have the how because it isn't just as simple just simply doing it. But, as @Jocko87 suggested... the clubs need to take the broadcast rights in house in order to be every where every one is on every device.
They don't need Bally sales professionals to generate revenue for Bally. They can hire their own sales professionals to generate revenue for them.