Not valid logic. There are many way to do things successfully. But there are also certain things that don't work, such as playing weak songs to improve "variety".
You just don't get it, do you? It's not a question of all songs being in a binary division between "weak" on one side and "strong" on the other, as if those two polar opposites were the only absolute choices. If the songs are tested properly, the results will rate them on a long continuum, from absolutely total strength on one end and totally weak losers on the other, and everything else spread across the middle. So, if you test 10,000 songs you can rank them all from number 1 at the bottom to number 10,000 at the top. You keep claiming that only songs numbered 9,600 through 10,000 can be played or else you'll lose your audience, your ratings will drop to zero, you'll lose your job, your wife will divorce you, they'll repossess your car, and you'll have to live in a cardboard box under a bridge. I submit that, to the contrary, out of those 10,000 songs, you can also play songs numbered 9,200 through 9,599 without risk of disaster. But your response is always to pretend that I'm suggesting that you play songs 1 through 1000, which I am not suggesting. And when I reject your errant answers, I'm accused of not showing you proper respect, since you've been working in radio forever.
I'll also suggest that if you test those 10,000 songs after numbers 9,600 through 10,000 have been played over and over and over and over, those songs will end up further down the list because you will have burned them out.
You suits do test at least 10,000 songs, right?