From what I recall pre-Rosie and Radio City Music Hall, the TV airing -- in fact, the very event, itself, IIRC -- was in serious jeopardy. The previous years' Tony shows rated very lowly. Sponsors were not lining up to pay for the air time and it seemed we might not "see" a Tony show unless something drastic were done.
However you view it, Rosie doing the show at RCMH "saved" the TV airing of the Tony Awards up until now. Doubtless, the tickets sold to the hoi-polloi help, as well.
Sometimes, compromises have to be made if a thing is to be saved.