I feel like that is a perfectly legitimate question, since I cannot recall any indication of Shallan being bisexual in the books, and one might argue that accuracy in regards to a character's sexuality is somewhat important when writing about a book series for a major fantasy books site, particularly when the person who wrote it went well out of their way to mention it.
I'm not saying he's wrong. He's probably not, and I simply didn't read deeply enough. But I am not seeing what your beef with this guy asking is. I am guessing it was posted here because the same guy who wrote it also owns the forum.
This is EXACTLY like the "Dumbledore is gay, didn't you know?" thing. What's the story here?:
So, yesterday my friend--encouraged by me daring her--tweeted at Sanderson about how she reads Shallan's reaction to Jasnah as being really gay, and that she finds it incredibly relatable. Neither of us ever expected Brandon to even see the tweet, let alone reply, so it was all a big joke we were having fun with. But... he actually replied! And pretty much confirmed bisexual Shallan to be canon?
Q: "Every time Shallan thinks abt Jasnah it's so gay which is #relatable, @BrandSanderson did u realize how bi u wrote her?? either way thank u"
So when he was writing Shallan's scenes, Sanderson was subconsciously thinking about Shallan and Jasnah hooking up? I think that says a lot more about Sanderson's sexuality than Shallan's.
Let me be clear, I think it's awesome when an author writes gay/bi characters. Richard Morgan's A Land Fit for Heroes series is incredible. But they have to actually write the characters that way, not just sort of hint at it in a tweet. Why does this upset me? Because Shallan is not a well-written character. This isn't mine, but I agree: https://www.reddit.com/r/Stormlight...oilers_shallans_clever_dialogue_is_making_me/ .
In addition to "cool" personalities, another big Sanderson weakness is that he can not or will not write a realistic adult relationship. No, he didn't write Shallan as gay/bi. He couldn't even write Vin as straight. All of his characters are neuter. No, that's not right. They're not asexual, they're presexual. A bunch of children, despite often technically being adults.
That has, of course, been greatly devalued by a leading politician doing it in real-live interviews with serious journalists whenever he opens his mouth.
Kind of ligitimizes made-up internet stupidity...
Back to Sanderson ... Indeed, it definitely would be newsworthy (if was true) if Sanderson considered writing about a person with deviant sexual desires...
Sanderson does courtships as well as anybody, but he just can't bring himself to follow through. It all works out okay when relationship development coincides with plot development so that the relationship doesn't need to be consummated within the story. There just can't be a lot of scenes in which the characters are married and have time on their hands. The relationship between Mat and Tuon worked out pretty well, because it was written so that their weird courtship would never really end, and they were either apart or occupied with the Last Battle. The relationship between Vin and Elend worked really well for the first Mistborn book, when they were just dating, but very poorly in the sequels where they're married.
It's annoying, but it's something he could work around. When a relationship gets to a certain point, create a distracting emergency and then end the books as soon as the action lets up. Alternatively, kill off one of the characters.