Yes, I am asking what those arguments are. Keeping in mind that “worse” is a relative term, i.e. it needs to be demonstrated how it was better at some other time, which the article seems to assume a priori.
All of the things you mention can happen more efficiently. There is no evidence that a wider availability of information reduces e.g. white supremacy, and in fact there is evidence[1] that it increases stridency. The increased availability of information is at least as likely to harden bubbles than it is to pop them, and while it's a necessary precursor to opening minds, it's not sufficient to do so on its own.
1. https://rationalwiki.org/wiki/Backfire_effect