You hit the nail on the head!
People who go into journalism tend to be liberal to start with, and tend to be on a crusade. They want to change the world.
In short, they are best described as “advocacy” journalists, because they aren’t content to report the news. They want to slant the news, to convince us that we should be liberal.
Just think about news reporting in recent years on various subjects.
They reported stories on alleged hardships faced by a homosexual because we didn’t allow homosexual marriage.
They lamented how tens of millions didn’t have health insurance, so there was an urgency to pass Obamacare.
They reported hardships faced by illegal aliens facing deportation or other consequences from their illegal acts.
They report dubious “science” to convince us that global warming is going to kill us all.
They magnify rare police shootings to try to convince us that all cops are racist, and make us think that innocent young black men are being used for target practice by police.
I’m sure there are many other examples, but you get the point. When they report on these stories, it’s always from a liberal point of view.
Some have even started not bothering to mentioning the “trans” aspect when they talk about certain asserted men or women.