Having a hard stance on the designated hitter is one level below trying to stump someone with the infield fly rule. It’s embarrassing by virtue of it being a cliche. It feels like cheap dialogue in a movie about baseball set 30 years ago, or the topic chosen by a middle schooler whose English teacher has assigned a paper to practice persuasive writing.
For someone who covers the sport professionally, it’s also inherently biased when the job description tells you not to be. It’s well-trodden, to put it lightly, from an opinion standpoint and obvious as a subject of analysis.