That's part of the beauty and haunting nature of the portrayal. One of the few depictions outside of Bret Easton Ellis' work and some others that rings true about LA.
Here's one of the best quotes about LA:
Everything in Los Angeles is too large, too loud and usually banal in concept
The plastic butthole of the world.
-William Faulkner
Depicting LA regularly just doesn't do it justice. The feel of the city isn't normal. It's a weird surrealistic landscape that sometimes can turn into a nightmare refraction of Alice's Wonderland. Basically, self-indulgence and Los Angeles go hand in hand. Self-indulgence is what makes Los Angeles Los Angeles. That's why it has the bad rep that it does. This film, it seems like, is having beauty on the surface layer and angst underneath. That's Los Angeles personified. It's one of those "necessary evils" of being in the film industry since it's located there - basically this seems to represent the LA that I know perfectly.
Or, in order to capture the feel and tone of the city it needs to be self-indulgent which the presentation here seems to wonderfully/hauntingly be. The more self-indulgent it is, the truer it is in this case lol. The city is truly like living in a neon color David Lynch realm where reality doesn't match up with the surroundings in a very melancholy way. The highs are very high and the lows are very low and the in-betweens are a haze due to the landscape and people. The juxtaposition in the trailers is perfection.
I think in terms of that it might divide people, because the trailers feel very haunting and true to me from having lived through it. The clash of the tones may confuse general audiences because from the plot synopsis and what's going on underneath the glitz and glamour surface layer of the trailer - it doesn't seem like it will be a happy film at all or at least for the majority of it, rather the opposite of the surface layer - melancholic. That might rub some the wrong way and have others go crazy over it. It's hard to describe other than saying that self-indulgence is a big part of it's character and has a big part in the role the city plays on the lives of those who live there.