I don't know, maybe it wants to have that capacity ?
Maybe, it knew that it needed it ?
Maybe, the Giraffe knew it needed a longer neck to eat from the tall trees. And grew a heart capable to pump the blood and the valves to keep it's head from exploding when it drank from a pond.
The fact is, the number of changes required press your harsh hope against time.
There is NO EVIDENCE only stories.
When you look at the famous Darwinian "Tree of Life" the only "evolution" that occurs is among the lines and the ever changing stories that connect them.
Obviously.
And you never will know.
You have no interest in knowing.
Your creationism is useless in understanding or predicting reality.
The reality is that bacteria under stress increase the mutation rate via expression of error prone DNA polymerase in order to increase the amount of genetic variation in the population that will be subject to natural selection.
Like a safe cracker trying every combination - if given enough chances it will eventually arrive at one that ‘works’.
Thus a ‘normal’ bacteria can change to a heat resistant bacteria, then be changed to a cold resistant bacteria then back to one that is ‘normal’. It didn't lose information - the DNA information is capable of changing via mutation to make proteins that are resistant to heat, then change again to make proteins that are resistant to cold, then change again to work optimally at ‘normal’ temperatures.
Thus your idea that information is somehow lost - and can only be lost - is wrong - will continue to be wrong - is useless - and obviously you have no desire to understand the reality behind what is actually happening.