It could very well be true, becuase people don't just make up random chords in music and hope they sound good- there's a theory behind it.
For instance, blues and rock frequently use a I-IV-V pattern. So, if you were playing in A, the chords would be A, D, and E. You will find 1000's of songs that use those chords.
There are dozens of frequently used progressions. This is how people that play by ear can figure out what someone is playing within a few minutes. The find out what key they're in and then figure out what progression they're using.
Uninformed people trying to make a big deal out of nothing.