This is not a view this is a fact, an album artist is not a track artist they are different tags with different meanings. TAGs have well defined meanings for most of the cases. Some people use them differently that does not change the tag definition.
The duration and track count is based on the fact that an artist is a track artist. Because that’s the normal default behavior you want to play tracks from an artist.
A compilation made by artist X without doing anything on the songs does not make the artist the artist of the track, hence why the different tags.
Now a DJ compilation where the DJ actually remixes things, can be both cases, that’s why if you consider the remix enough work to be attributed to the artist you add that artist as an artist of the track.
For the play on album artist without tracks, it’s a very recent changes to please the users who do not understand why Symfonium is based on track artists. But it’s a fallback not the normal case that is 2.