You see the brevity as a bad thing, I see it as a good thing. If you can’t get to the point in 280 characters you probably don’t know what you’re talking about.
Very very few things can be properly summed up in 280 characters, and most of them aren't important things. Don't forget that your brain cast its own prejudices and points of view over everything, it's very easy to misinterpret a 280 char long text, not so much when you read a 500 pages book in which the author describes every little bit of his thought process.
There is also a huge issue where people get tricked into thinking familiarity = knowledge. Reading tons of 280 char texts seemingly synthesising complex ideas in "single bite" portions is a problem, it makes you think you know something when in reality you just absorbed 280 characters of "facts" without any context or substance, it doesn't better you. Especially on twitter, which must be the most polarised and polarising medium out there. It is level 0 of knowledge acquisition.
> You must linger among a limited number of master-thinkers, and digest their works, if you would derive ideas which shall win firm hold in your mind. Everywhere means nowhere.- Seneca
Some discussions have nuance that cannot be expressed in 280 characters.
Yes, when expressing a simple idea or an idea you understand very well, you should be able to do so concisely.
However, when providing information to someone else about a complicated subject, or trying to provide reasoning for something, it's very easy to need more words.
There's a reason that encyclopedia entries are usually much longer than 280 characters even though they're expressing a single point that supposedly the author knew very well.
When answering a question that requires referencing multiple other pieces of information and where the answers aren't certain, you even more easily overflow 280 characters. For example, saying "I started with a ballpark estimate from these facts (fact, fact fact), and extrapolating with this assumption, you get to this. However, if you extrapolate in this way, you get a slightly different answer" etc etc, expressing that uncertainty, the assumptions, and alternatives are all _very_ verbose.
