I started using Lidarr. I have had a bit of a hard time with it not being able to just grab a song.
I think this is more in how I have my expectations and workflow set up. It works great for what it's built for, I need to spend some time to adjust.
I use it with the Deemix plugin and that is great.
Can't vs won't. I have no doubt that they could do it, but apple didn't get to be one of the most powerful companies in the world by doing the thing that is cheaper for the user.