It’s a fallacy to claim that LOTR and Middle Earth are not great platforms for adult shows because.. no one has seen an adult show on Middle Earth and see it fail.
Horse hockey. That's like saying that the universe of Dora the Explorer is ripe for adult themes because no R-rated Dora the Explorer film has been a flop thus far. We absolutely can and should judge based on our expectations of things--it's a great part of the reason we don't get into traffic accidents or stick our hands into lit fires. Yes, keeping an open mind is important, but it's equally important to know when you
don't want to try something. Classical orchestras tend to not program a new work by Aphex Twin before the intermission if they want people to stay for the second half.
I'm still looking forward to the show, and I also tend to rip on the Jackson movies, which are some of my absolute favorites (well...until we hit The Hobbit...), so take my gnashing of teeth with a grain of salt, because it's mainly driven by a desire to Do Better. But we don't go to see Adam Sandler movies and expect to be moved because that's not something his expertise and focus lend themselves to. (Admission time: Adam Sandler movies oftentimes move me out of the theater and sometimes out of the state. But the point stands.) I'm all for exploring new things in old settings, but sometimes these combinations don't work (peanut butter and pea puree) regardless of how hard you try or how clever the idea may be.
Sure, Tolkein described nudity. He absolutely, 100% did. But nothing in the authorial intent suggests that an 'intimacy coordinator' would be needed (quite the opposite), nor in the text itself (Maybe in the tale of Beren and Lúthien, maybe in The Children of Húrin, but not in the mainline story for sure). This show is absolutely expanding into the wilder world of Middle-Earth, and this may be a part of that. However, in the same way that we don't need to hear about how death certificates are written, we don't need to hear about Middle-Earthian sex because it's not the interesting part of the world.
Tolkien described nudity. But Peter Jackson removed it for his movies. Now Amazon wishes to put it back.
My main objection is this: why do they want to put it back? Is it because it's part of the story they're trying to tell? With Gollum, nudity was central to his story, especially how his lack of concern contrasts with the increasingly tattered clothing of Sam and Frodo, signifying how far they've come out of the comfort zones, how far they've grown from their comfortable homes with their comfortable, safe, norm-driven rituals of everyday life. That's great. That's a tasteful use of nudity to make an artistic point.* But--is it because they want to find the next Game of Thrones? Is it because they think that sex is part of the magic formula that will make them money?** I'm afraid that it's the latter. As you say, there's no way of knowing which it is. Sometimes projects motivated by greed can create great art. But I think it's unlikely.
*Are nudity and sex casual things under certain contexts? Yes, but not in this universe as it's been set up. It's like asking for a Star Trek episode about poverty within the Federation. This simply doesn't exist in the universe's canon, and any attempt to talk about it is going to use up a lot of the narrative capital which could be better used tot alk about other things, not to mention the time required to justify it, etc. That makes it a categorically bad idea.
**Note: it's possible to ask these questions about violence; whether we ought to treat it with greater respect, as a more sensitive topic, etc. I wish they were asked more often. However, that seems to be a losing battle, so I've made my peace with it. Besides, as sensitive a topic as violence is, on average more people have sex than die of violence, so I'd rather focus on the philosophical topic with the more practical applications. See: the number of people who participate in making babies vs. the number of people who die violent deaths.