correct -- but from CBS' perspective, they may have viewed Oldies as a dead format 5-10 years down the line, and 65+ is a tough demo to sell to. Strategically, the move made sense: Kiss was dominating the entire female audience. Introducing WODS as Amp Radio would hyper target young women, and Mix104.1 with W35+. In that situation, Kiss would've needed to pick a lane to fight in: W18-35 or W35+, and either way, CBS has a female-oriented station with no competitor to pitch to advertisers.
Ultimately, iHeart split both lanes by playing a ton of gold/throwback pop records on Kiss, bringing on Bex as a Matty producer, and tweaking Jamn's programming to counter Amp's impact.
I don't think the goal was ever to have Amp duplicate WODS' numbers, but to counter Kiss' dominance and prop up Mix. The project didn't work out for whatever reasons (programming, listening patterns, etc). Hindsight is 20-20.