Their primary singer and songwriter was not available. What were they supposed to do?
They should have hired Chaka Khan.
They could have done like other successful bands do and get someone that sounds like the original singer so he could cover their hit songs. Would that have been wrong? Instead they brought in a glory hog who couldn't sound right in any of them, making all of their stuff sound like Michael McDonald music, definitely NOT Doobie brothers. His voice ruined a great band for me. When the survivors of the Doors wanted to do a revival tour (Riders on the storm), they brought in a singer who sounded almost exactly like Morrison, they didn't bring in someone who sang like James Brown.