Actually, beside the facetious aspect of this, there is a subconscious value into having code-mass. Heavy means stable at times.
Software is always easy to alter, hack in some code here and there, move some functions around, add and rename files. The larger the software the more places to make changes.
It's unlike a physical structure where a 1000 tons wall really can't be moved.
you can always delete for free but there's no system anymore, and if you change randomly the system might fail