The discover part takes place on Bandcamp, but Bandcamp's involvement ends after you've bought and downloaded the music. The enjoyment part that comes afterwards happens on your device, using whatever music player you prefer to play the files you just downloaded. It's enjoyable because you get a bunch of zipped, DRM-free .flac files you can play on any device, instead of being bound to some specific app or in-browser player.
At least that's what I think the intended use case for Bandcamp is. That's how I've always used it.
He wants a player to be given to him as part of the package. Which is nice. I think the most efficient market would incentivize a holistic package where you pay for someone to make the hard decisions for you while letting the experts take the core content and use it however they like.
And Bandcamp's target audience prefers to own their music and knowing that it will be on their device of choice tomorrow or in 30 years without the fear of losing it due ending licensing deals. Not to mention all the obscure and rare music that never made it to streaming services in the first place.
Your preference is well served with Spotify & Co. No need for Bandcamp to use the same streaming approach.
At least that's what I think the intended use case for Bandcamp is. That's how I've always used it.