Well, if we're to assume the financial issue surrounding the Tony performance would carry over to other television performances, whether they want the cast play instruments or not, artistically, is moot. There are only a limited number of songs Raul can do alone if he's the only one getting out there.
I wouldn't have so much a problem with something that's been done already as I would with the idea of doing the same thing two days in a row, but apparently it'll be two different songs, so that's also moot.
A work of art is an invitation to love.