all three {TV networks} have leaned Democat / Liberal for decades.
You're baldly stating that as fact when you should be stating it as your opinion. There is never absolute neutrality, but I believe the traditional networks make an effort to be impartial and fair and succeed most of the time. If anything, their weak point is their desire for access. That's why Trump gets better coverage than he otherwise would...and definitely better coverage than Biden ever got...because, for all his complaints about the media, he gives lots of interviews.
Fox News is really an opinion and commentary cable channel.
Fox claims there is a separation between its news programming and its opinion programming, though its news programming has a particular slant, often evidenced by choosing to ignore stories or events that the traditional networks are covering.
All-news cable died several decades ago when CNN started to do commentary and opinion shows.
Then it shouldn't be used as a criterion.
(Edit: This assertion also doesn't take into account the 24/7 online services of NBC, CBS, or ABC; available on YouTube TV and similar subscription services.)
Newsmax is not on many cable systems (including mine) and is very secondary... at best
You're not taking online outlets into account. For someone who says "journalism is changing" (see below), that's a substantial omission.
This opens the door to a lot of dissident opinions on how AI has changed how news should be gathered. Colleges, on the other hand, teach traditional writing rather than street reporting.
I know the program I went through had plenty of street reporting (I know, I had to do it); in that program's current form, reporting not only continues to be emphasized, but the previous silos separating print and broadcast have been removed, and new media such as podcasts and TikTok are used in addition to traditional media.
My point is that journalism is changing. The internet, social media and AI all make it possible to reach more people and to discover more information than ever.
The reliability of that information, though, is increasingly questionable. The reader, listener, or viewer has a heavier burden now, and many of them are not equipped to meet that challenge. Along with more information comes more disinformation. That's how, for example, we get measles outbreaks thanks to disinformation coming from political appointees in the current administration. When people lie, or say things that are flat out wrong, they should be called out on it.
Journalism may be changing as far as the way it's delivered is concerned, but that doesn't mean standards should be thrown out the window. The CBS News staff who are pushing back against Bari Weiss may be arguing from a weakened position, but they've got a point.