But in practice I find Twitter entirely reasonable. My feed is arguably much higher quality than HN for my purposes.
Do the same with HN and you will see the good parts of it are entirely reasonable as well.
Taken as a whole, I don't see how Twitter as a whole is reasonable. In my opinion, on average it is probably the most toxic, inane popularity contest of any social media.
That said, this is a Thanks HN post, so I don't really care to make this a whole discussion about the blue site vs the orange site.
Conversely I don't know of a single person who uses Twitter who doesn't believe it to be an absolute hellsite of inane misery.
Twitter is quite self aware, HN... not so much.