I agree with Trey. Of course, it's up to the client and the aesthetic they are going for, but really, who's suspension of disbelief are we trying to serve? No one. It's non-fiction.
I used to ask what was preferred all the time and they almost always say hide the mic. Now I don't ask, make it sound as good as possible, and let the person in charge (NOT THE DP) tell me to move them if they don't like it.
I did sit-down interviews with the cast and creators of a narrative show. They were sitting in producer-chairs, you know the ones, in front of a "fake" patterned backdrop. Halfway through the first interview, the DP says we have to cut because she's seeing the lav. What about the chairs? The backdrop? These double standards are insane. Anyway, the producers all agreed with her but I fought to keep the mics on the outside and I won. We already shot half the interview. It saved time on set by not having to really get in there and then fuss with them when they were scratchy.
Somewhat unrelated but on a doc I did when I first started, we were interviewing a famous playwright in a playhouse. I think we were primarily using overhead house lighting. I set the boom on a c-stand and what no one was ready for was that the subject kept leaning forward under the boom, putting nasty boom shadow right on his head/face. He was still on the edge of the mic pattern so not a problem for me per se, but the DP wasn't happy (quite understandably). But instead of ANYONE calling cut, the DP looked at me helplessly as if I needed to interrupt the take. That's what directors are for.
Getting even more off topic..
And on a multimillion dollar narrative feature I'm on right now, the out-of-his-element AD outright refuses to allow sound to ask for resets or to hold for planes (even early in a oner where the dialogue hasn't started yet!!!) meanwhile the cam op and 1st AC get all the resets and adjustments they want. It's only "ruining the take" if sound asks for something while camera is repoing while rolling.
My point is, there's a weird culture of double standards and sound constantly getting the short end of the stick and it just makes me sad.