You shouldn't because it's not a matter of belief. Thankfully I stand on the shoulders of scholarly giants and you can find a decent enough pile of their clinical trials and research data (sesarchable too) under Archived References and for more recent blog posts the references can be found at the end of each post.
If you are dealing with the restrictive eating disorder spectrum (anorexia nervosa, restriction/reactive eating cycles, bulimia nervosa, orthorexia nervosa and/or anorexia nervosa) then you can also take a step back and think about what in the guidelines for recovery is really at issue from your own instinctive perspective.
Certainly there will be a lot of a noise and chatter in your mind from the anxiety over weight restoration, and you may even be very cognitively compromised due to starvation, but nonetheless there is a part of you that will sense that the guidelines are not set out to undermine your recovery, but to facilitate it.
The information provided here is set out to help guide your decisions and it is not meant to dictate solutions. No one here will compell you to do anything that simply does not sit right for you.
So take a look around and see what you think.