Said nobody ever.
(I also somewhat agree with you, I have a bunch of real world friends now, who I first came to know via Twitter retweets - back in Twitter circa 2011 before the "brands" arrived. I'd totally given up by about 2018 and deleted my account.)
Now ask yourself if anybody ever said what you're responding to?
No they did not. If you read it carefully you'll note there's a slight change. I missed it too on first read.
If Twitter went away then that specific platform would also go away. True, it's sad that said platform is also a hub of tribes and divisive arguments and design patterns that support mindless retweeting, but that's just how social media that needs to keep expanding its audience is designed. If an audience wanting to be a part of that culture by giving in to those patterns without slowing down to analyze the ulterior motives of social media companies like HN commenters often do motivates artists and creators to bring their work there, as they now have a sizeable audience, then I can't really complain or force them to move elsewhere. That would just be exacerbating the same issue of being divisive. I can't force these people off Twitter just because most of Twitter personally bothers me.
Yet, that still isn't enough to prevent the occasional content creator from retweeting something from a different handle that shows up on your timeline, and that specific retweet has nothing to do with the content you want to see and delves into divisive or political territory. But you also receive value from the person who retweeted it through their art. It just goes to show that separating these things is a human issue with no easy solution, and it's tempting to get frustrated at the status quo.
Me too! If I discover an artist I like, I'll scroll through their feed quickly before I decide to follow. If they tweet mostly one liners or politics with only the occasional artwork, then it's a pass from me.
One other thing I'd suggest is muting certain keywords. Adding political terms to your mute list can clean things up significantly.
And then the platform owners mostly misunderstood the problem and emergent solution, and natively implemented something similar but optimised for advertising sales metrics ("engagement!") instead of what the users were actually doing.
And then as the user base changed from it's early-userbase to being heavily biased to marketers (sorry, "influencers" and/or advertisers), and social media expert gurus started talking about "message amplification" - and so we end up with new contenders in the field thinking that the lack of ability to shout "brand messages" through a megaphone was the problem those early users "invented" retweeting to solve... <sigh>
(And now I'm imagining a world where a St*rbucks-like cafe chain hands megaphones to everybody as they enter the store, with the implicit understanding that you shout out every interesting bit of conversation you overhear, which inevitably quickly develops into people only shouting out other people's megaphone shouts because that's all you can hear, until eventually if crescendos into a Hendrix-esque never ending earsplitting feedback wail - probably Star Spangled Banner for maximum crudeness... Has Black Mirror done this yet?)
But because the button is right there the more useful emergent version died completely off.
"I totally made the world a better place today! I , ummm, yeah. So. I just parroted an actual activist's well thought out and carefully composed tweet, instead of doing anything of substance at all myself... What am I doing with my life? <sobs>"
Does amplification of messages count as "nothing of substance"? "Getting the message out" is a crucial part of activism, is it not?
People still re-share it, Instagram just encourages and rewards you to just steal the content and pretend it's your own and because the system doesn't support hyperlinking it's very difficult to call people out on it.
It's a huge issue for any artists on the platform.