Thomas Rhett is an interesting example of where modern country is progressing. He's college educated, writes many (maybe all) of the songs he records. Because the songs he sings are about the lifestyle of twenty somethings his audience can easily relate to him and his songs.
Actually he's involved in the writing. He has a GOOD number of writers he works with. One of which, is his dad.

But, yes...many of his songs pull from life experiences.
Usually, in country music...actually, a lot of radio music...if someone is talking about a song they wrote; there are other writers involved. The funny thing is; I'm frequently surprised at how many will say "Oh I know" but don't think that's the case with the songs THEY like. Funny how that works. That being said; country at least mentions the writers fairly often and even give awards to them. That impresses me.
Producers...now that's a different story. He's worked with a number of them but really gravitates towards Dann Huff and Jesse Frasure. Dann's the man.