It is often said that dark energy is fine tuned to 120 orders of magnitude. What I understand from this is that if you use quantum field theory to predict the energy of the vacuum and compare it to observations then you are off by 120 orders of magnitude I have a few questions regarding this. 1) is the above correct? 2) if 1 is correct then why not just assume that dark energy is not vacuum energy but something else? 3) this is not the same degree as saying that dark energy is fine tuned for life in the universe or is it? i.e if dark energy were smaller than 120 order of magnitude could life still exist.?It seems to me there are two different senses of saying something is fine tuned 1)for agreement with observations and 2) for conditions for life and these should be different.