Very simply the ‘junk’ DNA as you prefer to call it.
All changes that allow for adaptation and survival had to be pre-programmed into the code by a higher intelligence.
Mutations simply do not increase the amount of information.
So why would they express error prone DNA polymerase? How would introducing mutations help to unlock what was supposedly “pre-programmed” in?
Mutations CHANGE the information - instead of coding for glutamine - a mutation could cause the codon to specify alanine - for example. How would this be a “loss of information” rather than just a change in the information?
Why would mutations during stress be a good idea for a bacteria if all mutations were going to do was make the bacteria “lose” information?
How about gene duplication? Is that a loss of information as well? If a gene is duplicated and one version changes and the other remains the same - wouldn't that be a “gain” of information?