This is at least the argument that you will hear. On the one hand completely shutting out political content does seem like a let them eat cake attitude. But of course it isn’t binary. The problem is that the political content is everywhere now and it’s toxic. I don’t want to ignore the problems of the world and I also cannot allow the endless yelling to drag me into depression.
I'd wager to say anyone that's active in local politics is doing more good than 90% of politics-tweeters.
You cannot use this customized experience as the sole argument to imply that experiences of other people on that website are somehow abnormal. When customized feeds and algorithms are in play, there is no such thing as "normal" experience to begin with.
Another layer to this issue is the fact that Twitter (unlike some message board from early 00s) is big enough to influence society at large, so while you might decide to ignore a particular drama, the drama might not ignore you. Because of that a lot of conventional wisdom about "The Internet" doesn't really apply.
Twitter is not real life. It's a deranged, toxic simulacrum of an alternative universe built by a god who hates us.
It would be one thing if the negative stuff from Twitter was just internet drama and stayed on Twitter. Then anyone could "opt out". But it doesn't stay there. You can't opt out of things that spill into your life, your downtown, your company, your country.