Remember when you could just plug in anything with an "aux" cord or line-level RCA connectors to your stereo and everything worked. We have gone so far backwards.
We traded one convenience for others. I can play the same music in sync across every room in the house and the backyard, and I didn't have to run speaker wires to 23 locations to do that. I can play any of millions of songs without having a room full of physical copies of the music. I can plug in an aux cord into the system if I need to do so.
But there was an endless amount of people, even on this site throwing arguments as "BT is the future" or "you're just too poor to use BT because you don't want to buy a new headphone" yada yada yada
Yes, losing the wired connection is going backwards