Exactly, Fever. Back in the 70's, I use to listen to a lot of radio, and that is usually how I chose my music............what was being played on the radio.
Of course back then, the album usually contained more than one "good" song, the whole albums were good
Today, that isn't always the case. You have one or two hit singles, then the rest of the CD is fluff.
I could name a lot of good songs off albums, but they wouldn't ever make a list like this because they never received much airplay.