Avi K, I didn’t opine about whether it may be a problem to listen to any secular music. I’m simply noting that Shlomo Carlebach did, regardless of any claims to the contrary.
If you want to know my opinion on secular music, I think some is problematic, and some isn’t.
The same is actually true for “Jewish” music, but with a smaller percentages being disagreeable and to a much lesser degree.