You are obviously an experienced editor and this would not prevent you continuing you adding your releases as you currently do, but for casual editors its much more difficult and time consuming. I occasionally add releases to MusicBrainz and have done over many years but I can never remember the details of the various scripts. Users who are not particularly interested in MusicBrainz but are interested in good metadata (e.g roon users) are always finding MusicBrainz entry unfathomable. For my part I add releases with release seeding but not performer credits because takes too long, you may consider that a bad entry but it is better than not having the release at all, and if there was a way to preseed the credits I would use it.
And in your example it doesnt take 7 days to enter the information, just 7 days to wait for the data, very different. Im not recommending adding super bad entries but tigerman said
so someone could be selective about feeds and just take good ones.
Regarding Discogs, they tend to concentrate on physical releases so not so good for the shift to digital releases.