Yeah this is complete and utter ********, though.
What makes something safe to eat is the temp it is cooked at and the time it is held at that temp. 74C for chicken is instant safety.
Cooking to 65c, which is what they temp will be with carry over cooking after pulling at 62 ish requires 4 minutes to kill any pathogens.
You can safely cook chicken below that temp, as long as you hold it for long enough that pasteurization takes place.
Cooking chicken breast sous vide is hands down the best way to ensure it comes out tender, juicy, and full of flavor. Here's our complete guide to making sous vide chicken breasts.
www.seriouseats.com
Beef is more dense than chicken, which is why you're able to eat it rare. The pathogens don't really go past the outer layer. Same reason you can have steak tartare safely.