Perhaps 2 years ago, I came to the conclusion that people with a ruddy and otherwise not-baby-smooth complexion know and expect pictures of them to show their complexion issues. So, I've concluded that I may use the Lightroom 'heal' function on a couple of the big pimples and maybe other similar temporary blemishes, but other than that, leave moles, scars, even rosacea (One woman that's been in a number of my photos at church has rosacea covering 2/3 of one cheek) unretouched.
I don't do portraits or other paid photography, but sometimes a small group of people may want their picture taken, or even an individual, and the resultant image shows up everything from stray facial hairs to unusually large pores, etc. One of the reasons I'll always take 3-5 shots of a small group is to get a choice of which photos to keep and which to delete. If someones' pores etc is overly prominent in one shot, I'll most likely choose one of the others as the 'keeper'.
Also, consider the finished image size and how it will be viewed. Obviously, for an image projected on a 20 foot x 15 foot screen, someone with big pores or heavy acne scarring should not be one of those images. For a 4" x 6" print, I'd have no problem giving them those prints. Remember, other than those with photo editors, very few will ever see the picture as large as we do while editing. These days, most photos get seen on someones' or a group of someones' cell phones and that's the end of it. They're not likely to see a couple of zits on a cellphone unless it's a portrait shot.
I don't do weddings, but if I did, I'd be in a real quandary if the bride or any of the bridesmaids had significant complexion problems. As they will each be the subject of many photos, you'll have to decide how much blemish correction and skin smoothing will be done in EACH (keeper) photo of that person. I've caught myself making that mistake for a high school stage performance a couple of times. Fortunately, the parents only want to see their kids and don't pay much attention to any fancy editing I may or may not have done.