wow you know nothing about food science, the sear is a myth, it does not lock in the juices.
a properly cooked food is juicy, it is a matter of the right method for the food and the desired done-ness.
if you want to cook your steak until it is well done and still want it juicy the trick is to start with a fatty cut of meat like ribeye, then cook it longer over lower heat, for the same steak cooked medium or medium rare, start it on high heat for 2 min per side, then move to medium heat for 5 min per side depending on the thickness.
I love how people who failed home economics in high school try to explain how to grill. try taking a few culinary arts or food science classes at your local community college, then maybe your girlfriend/wife won't have to feed the dog their meat.