Ok, I’ll bite.
The experience of sitting down with a CD with its booklet and cover is different to calling up a file from a server or streaming platform.
A CD player is immediate. No need to download the CD before enjoying it.
A physical CD provides much more income to the artist. This is especially so with CDs bought directly from the artist at concerts or via their web site.
Soulseek is a peer to peer “sharing” service that seeks to scam artists out of earnings whilst enriching the app developer.
A CD is a possession to keep or to gift. It is an item to own not a service to subscribe to.
Finally, who really cares if someone enjoys CDs alongside more recent ways of listening to music? To quote Bob Katter “Let there be a thousand blossoms bloom.”