Great comment.
> I always hated how much teachers would drill symbolism and literary device analysis into you in school but then I come across threads like this I wonder whether we aren’t focusing on it enough.
I feel, the inability to treat the glass solely as a symbol, is more related to the form of writing.
This sort of confessional writing, it does not tolerate symbolism well because the author is also the protagonist. The symbolism of the glass, in this article, it's more of a protective screen. The author explicitly writes the glass wasn't really the issue, but then we never actually learn about all these other things that were the real issue. Like, dedicate some paragraphs to it dude, don't leave us hanging! In the writing, he's a kindly, oblivious man. We get hints that he wasn't. Disrespect, what's that exactly, that can be downright cruel, where on the spectrum are we here? Beyond the glass, honestly, there's nothing. Like, was he rolling his eyes when she was talking to her. "communication issues", what's that, did they share meals in silence, or where they fighting like cats and dogs, but then making tender love to make up, what's going on?!?! Tell me. The glass really is the thing here. (Maybe his book has more, I don't know). For all intents and purposes, yeah, it was the glass. The reader can only understand their divorce in vague generalities, and since we get nothing more than the glass, it feels more like a distraction. Also, like come on, we need to hear from his ex-wife!
Symbolism in fiction, functions more like an anchor, around which the mind can wander, which invites us to contemplate. And we can, because, honestly, right or wrong, it doesn't matter. There's less of this need to get it right, make sense of it. The motives of the author are just less important, a reader has less of this curiosity or nosyness, in the sense, that we're tickled to take a peek behind the curtain.
I think, if the article were written as fiction, say a short-story, that glass would be great symbolism, and there would be less this need to come up with solutions, or try to pinpoint who was right and wrong, ... But in that article, I don't know, it feels more like a dodge.