One of Dylan's achievements is that he is purposely vague in his metaphors. He is a Rorschach test in that so many interpretations can be given to his lyrics.

I think Dylan did flirt with drugs for a while. Most pop singers of the 60's did.
For example, "Mister Tambourine Man" suggests an LSD trip.

A lot of songs from the Sixties dealt with using drugs and to this I shrug my shoulders and say so what?

As for Dylan's lyrics, I find them sophomoric and shallow for the most part. The one love song I except and like is "Tomorrow is a Long Time". I think that there have been performers who have done his songs very well, much better than he.

He also becomes "Positively Paranoid" in "Positively Fourth Street".

I prefer Paul Simon or early Joni Mitchell instead of her later "Slouching to Bethlehem".

As a theologian, I don't see any important information coming from him about that subject. "You've Got to Serve Somebody" is an appeal to Authoritarianism, an attempt to embrace "Big Daddy" and I don't agree with the premise of the song.

You stop serving "Someone" when you learn to think for yourself.