SexWarrior's argument of "lol it's Twitter, don't take it seriously" fails on several points.
1. Twitter, like any sort of medium, can be used both for shitposting and for serious communication. The White House uses Twitter seriously, and Trump can too.
2. Say some of what Trump posts is shitposting nonsense, which yea, it probably is. But by his own admission, he also uses Twitter for serious communication to supporters and the public alike, so it is best to assume what he says there is serious unless shown otherwise precisely because he is the president. If he says something serious, and we assume its shitposting, he has power other trolls do not to enact his intentions on a global scale.
3. Say everything on Trump's twitter feed is shitposting nonsense. Even if everything there is 100% bullcrap, he is still posting it for a reason, yes? I can't believe SexWarrior would be naïve enough to think Trump is posting "for the lulz". It is pretty obvious that he tweets to control media narratives or misdirect attention away from other things, and as such it is important to pay attention to his tweets even when they are shitposts.
4. And finally, let's say everything Trump posts is inane shitposts for literally no reason. You still shouldn't ignore it, because he's the goddamn president, and his words have consequences on the global stage. Trump tweets about Boeing building Air Force One, and Boeing's stock falls $2 per share. And that's not even the most effective thing he could do. Trump's twitter feed literally has the power to cause a diplomatic incident. Other trolls do not have this power. So it is still important to pay attention to what he tweets.