Why YSK: When you cook meat, any water on the surface must first evaporate before much browning can occur. You want to get as much of a Maillard reaction as possible in the limited cooking time you have before the meat reaches the correct internal temperature. Removing the moisture first means that the heat of the cooking surface isn’t wasted on evaporation and can instead interact with the meat to form the complex sugars and proteins of the Maillard reaction.
Well… believe it or not there is a suggested internal temperature for cooking beef, even if it’s not ground. The CDC recommends 145F (~63C) and FSA recommends 70C (~158F). It’s certainly true that beef is one of the safer meats to eat at undercooked temperatures (at least in the U.S. & U.K.), but it’s also true that you can achieve just about any level of doneness beyond blue while still following food safety guidelines.
As I’ve said elsewhere, I have difficulty maintaining a super-sterile kitchen, so I can’t practically leave meat out at room temperature all day without risking food poisoning. I instead opt to expedite the process by microwaving at low power. Even if you view these guidelines as silly, there remains the practical application of being able to sear thicker cuts without leaving an overly raw center. When your total cook-time is <5 minutes, these things matter.
Cooking a fresh steak to 63 degrees sounds like a waste of money to me. ( And so does cooking chicken to 70) But I think we can all agree to that because we know those are the temperatures that indicate safety if it reaches that for 1 second. And lower temperatures over time are also good.
Generally I prefer reverse searing steak because it allows for a tender perfect inside with a hard crust and no gradients in the doneness. But if I don’t have time for that (or for a sous vide waterbath) I just cook straight out of the fridge in a cast iron while flipping every thirty seconds. And for anyone doubting that flipping 30 seconds is superior to not touching it before flipping once: your steaks will be less evenly cooked which I don’t like but you are free to do so ofcourse. Read Kenji’s article on it if you don’t believe me: https://www.seriouseats.com/the-food-lab-flip-your-steaks-and-burgers-multiple-times-for-better-results