Perhaps it depends on your "Ship of Theseus" perspective, but we have all kinds of evidence that demonstrates music fans are quite often more than happy to see a live performance of a set of songs they've come to love even when not performed by the original artists. Look at how many bands are still selling out arenas even when original members are no longer with us.

Presumably individuals involved in these cases are already tapped out for how many performances they can do, so why not have other people put on the same show to expand the supply?