People that don't know what BuzzFeed News is definitely do not know what ProPublica is. This thread is rather shocking to me.
Not wanting "BuzzFeed" to be someone's source of journalism is not the same thing as that person not wanting to consume high-quality journalism/news.
That said, I could understand the argument that if someone is generally well-read in this world, they would definitely know BuzzFeed News was, for the most part, a separate entity. I can only speak for myself - I'm fairly happy with my mix of Propublica, The Economist, USA Today, and NYT, but I've also not really analyzed that mix much since 2019, and I definitely don't read everything all the time (it's too much to consume).