I see no reason not to continue with work and implementation. Choices are a good thing! 🙂
The notion of a requirement that such data is included before audio tracks can be uploaded in certainly not in favor of.
In my particular case, I often strip out all the fields in the fields of the .mp3 file, or decide on what metadata i want in there.
Musicbrainz is a publicly editable database where control over the works by the artists themselves is seemingly wrested from them and their publishers.
I just don't know enough as of yet I guess, but to make it mandatory is quite a stretch, and it sounds someonedictatorial.
So yes, I think much more discussion is in order.