Flashy article title clickbait. Doctors are not fools. If a tool truly made their job easier, it would not be rejected out of hand. Job security for physicians is rarely the issue, there are plenty of sick people.
And early thermometers weren't as practical as they are today, someone going to the doctor for a cold probably doesn't want to be sent to the hospital across town to wait in line for a 25 minute temperature rating when the doctor's hand is usually "good enough": The original thermometers were a foot long, available only in academic hospitals, and took twenty minutes to get a reading. And it's probably the same with C…
That's what most doctors in my country would do. Are you saying that US doctors will send you to CT right away, just to be sure?