You're certainly entitled to think that. You're not, however, in the majority. When I hear MC Hammer "U Can't Touch This" on a classic hits station, my first thought is "I Can't Stand This." Then, I'm off to another station. My reaction definitely isn't, "Wow! That's variety." About 30 years ago, we had a good test of the deeper playlist philosophy on the oldies format. Adams Radio typically ran oldies stations with deep playlists and thought they did it better than anyone else. The reality was, after getting competition, the Adams oldies stations were decimated by their more tightly programmed competitors. In San Antonio, Adams decided to take on KSMG "Magic 105.3" by flipping AOR 99.5 KISS to oldies. I even seem to remember KISS running liners that said, "Magic 105 only plays 475 songs. 99.5 The New KISS FM plays 750! Double the variety. Double the oldies!" KISS dumped AOR for oldies in the middle of July 1990. The result? By the end of the year, the GM who presided over the format change was sacked. The new GM pushed the PD out, but said GM only lasted a few months himself. By Memorial Day 1991, the station had gone through two GM's, two PD's, and the entire initial oldies airstaff was either fired or transferred to other Adams properties. KYA in San Francisco, not an Adams property, also had a deep playlist. After KXXX-FM dumped CHR for oldies KFRC-FM, KYA went straight to the bottom and lasted about another three years before KFRC bought it and got rid of it.
My experience has also been that listeners perceive stations repeat more songs than they actually do, especially when those are songs they don't like. Bad songs tend to really leave a bad impression on listeners. As an example, I used to work at an AC, and a friend of mine worked at a Great Clips that played my station all day long. After the Dixie Chicks released their cover of "Landslide," she told me we played that song too much. She swore up and down she heard that station 8 times every shift she worked. I informed her that wouldn't be possible unless she worked a 30 hour shift. Our powers were on a four hour rotation. On an average day, you would only hear that song six times from midnight to 11:59. Depending on where the song landed, you might hear it seven times in a 24 hour period, but you could never hear it any more than that. During an eight hour shift, there was no possible way she could hear that song more than three times. At least one day a week, she would only hear it once. She, however, hated the song, only had the radio on for background music at work, and thought she heard the song more than she really did.