Focusing on net income was meant to keep inexperienced reporters from being bamboozled by IR/PR departments that sometimes went to crazy lengths to find something positive in the midst of a crummy report. (One tech company with dwindling sales, profit and market share liked to talk about its strong cash position.)
Of course, that was in the days before up-to-the-second updates on after-hours trading. So now reporters know the market's verdict within a few minutes of the earnings release. That leads to financial-results stories that hunt for something (earnings? revenue? next quarter outlook?) that explains the stock movement. In this environment, different metrics get different levels of prominence all the time.
I wouldn't burn up a lot of energy coming up with conspiratorial reasons why reporters pick different numbers. Inexperience and confusion usually are the simple reasons for 90% of strange decisions. This is probably true in a lot of areas.
If people would ignore fake news, we wouldn't have so much misinformation issues, people biting the onion and flat earthers.