I don't think Drew is being too off the mark from my own point of view, but I don't think I'd express the same way he did.
Most of the time people pay me to record only. During the course of that as the relationship between me and the band grows, we'll get "into the moment", and new ides will come out from all sides as we discuss and listen to the songs...But I don't think I'd ever actually tell a band that I think they should cut a riff, change arrangements, etc. I may suggest shortening a section of they play the same riff for like 2 minutes with no vocals, but otherwise I stay out of thier "art". I feel like I'm there to make it sound as good as I can make it. And, maybe this is lack of confidence on my part, but I usually don't feel like I a.) know the band well enough b.) know the song well enough to actually think my ideas are/would be better. Most of my recommendations come in the form of guitar melody/solo ideas when tracking leads, the rest is usually based around the vocals, mainly timing and enunciation. Sometimes I feel like I'm a thesaurus in trying to keep a band lyrical intent intact, but also rhythmically correct, lol.