I think that the more technology advances, the more rectal temperatures should be taken in addition to or instead of orally, under the arm (auxiliary), etc. Think about paper. We used to use a fair bit of it annually. When computers and smartphones became widespread, we did not stop using paper, as everyone thought; instead, we started using more paper due to needing to print, scan, etc. things from new technologies.
In my mind, rectal temperatures should be treated like the paper, and other newer methods like a document on the computer that needs to be printed.
You have always used the “paper” way. Then, slowly, people began to purchase computers. Soon, almost everyone has a computer, including yourself. The doctor’s office even has one in every exam room. You go to the doctor, and the nurse gets busy. She Types up your information, but then she needs to print it. So, she grabs a stack of paper, puts it in the printer, turns it on, and then hits “print.” Slowly but surely, the “paper” comes back out of the printer, this time with ink. Then, the doctor comes in. He asks a bunch of questions, which he types into a database. When he is done, he writes a prescription on a pad, then tears the “paper” off the pad and hands it to you to get filled.
I guess what I’m trying to say is, just like you can have paper without a computer but you cannot have a computer and not paper, you can have a rectal temperature taken without an alternate method but you cannot have an alternative method without it being followed by a rectal temp.