Have you ever gotten a new job? Did you use a resume with a bunch of sweet positions at companies you've held to give yourself worth and leverage to deserve the new job? Do you think if all you had was mowing lawns you would get the job at Google? Or if you said you are currently working at NASA? Which gives you more leverage? "Hey I'm currently mowing lawns in Virginia, but I would love to come work at Google! I loved 'The Internship' movie and it looks like a great place to work!
". Or how about, "Hey, I build spaceships at NASA but would love to come to Google because my family lives in Mountain View and I've always wanted to work with you for xyz reasons."
Did you negotiate salary at your new job based on prior or current salaries that you held or hold? If starting pay was 17/hr, do you think they would give you a raise if you said, "My current job I make 10/hr but I really want to make 20/hr with you guys?" Or, "My current job I make 22/hr, but I would be willing to work for 20/hr with you guys because I love Google?"
It sounds all good and dandy to "get your name seen again" or "tell them how much you love them" but in the real world it is a two way road and you need to have something to offer in return in order to bargain your way to an acceptance with a LOI.
The laughable part is that any comparison is necessary at all, but for some reason so many still don't understand... people will continue begging schools to accept them or promising 8 schools that they will come if accepted. What it does is ruin the entire purpose of the letter of intent to the point that they start losing their value for all applicants all together.