They probably saw how the muted mic thing backfired on biden spectacularly (maybe on purpose? Change his drug cocktail and then not let him be interrupted so there was no question as to his mental decline).
And so now Kamala’s people see this and want crazy debate trump from 2020 so they can turn it against him.
But what if ABC wants her to fail and this is part of the push to get trump back in.
Many possibilities here