I'm guessing for the same reasons people choose a career when they don't plan to work for excellence or their paycheck. Fortunately, there are careers wherein lives matter which require licensure and/or certification to ensure a minimum standard for competence. Unfortunately, journalism does not have a minimum standard for competence.
Here’s a link to a very funny reddit thread about Dr. Seuss and even grammar nazis. In the thread a woman claims Audrey Seuss donated many books to her sorority and raised the literacy rate. lol