Hi Andre,
I’m not sure I understand your arguments.
At the current time, where releases are both provided physically in form of CD’s and “virtually” in form of downloads or streaming, I do not see a difference in providing metadata in printed form (booklet) vs. track based information as tags (at least in terms of a proper string fot the title track.
So to me, having a download or a streaming album with missing metadata is like receiving a CD with only half-printed booklet or with no booklet at all.
I think we should expect the same care from publishers for both, i.e. to have it available at the time of purchase (or streaming).