I am convinced that producers go out with a company checkbook and standard boilerplate, find acts that have good songs, then buy the rights to those songs.
They then give the songs to larger pop artists and never credit the original artist because there is no need. They likely pay well for a decent song.
One of the biggest examples of this for me was " even if it breaks your heart". I was pretty happy hearing a pop country song with decent lyrics, to find out it was written by Will Hoge and Eli Young Band bought the rights.