I don’t think it affects the essence of your argument, but I would say that you cannot get a good estimate of the Kolgomorov complexity of Word or other modern software from binary size. The Kolgomorov complexity of Word should properly be the size of the smallest binary that would execute in an indistinguishable way to Word. There are very good reasons to think that the existing Word binary is significantly larger than that.
Modern software development practices optimize for a combination of factors where binary size has very little weight. Development and maintenance time and cost are paramount are usually the biggest factors, absence of bugs and performance are relatively smaller concerns in most cases and size not a factor except in some special cases.
I don’t think it affects the essence of your argument, but I would say that you cannot get a good estimate of the Kolgomorov complexity of Word or other modern software from binary size. The Kolgomorov complexity of Word should properly be the size of the smallest binary that would execute in an indistinguishable way to Word. There are very good reasons to think that the existing Word binary is significantly larger than that.
Modern software development practices optimize for a combination of factors where binary size has very little weight. Development and maintenance time and cost are paramount are usually the biggest factors, absence of bugs and performance are relatively smaller concerns in most cases and size not a factor except in some special cases.
Sometimes human programmers do optimize primarily for size and if you look at the tricks they came up with have similar vibes to some of the biology tricks described in the post. For a charming example in early constrained computer systems look at http://www.catb.org/jargon/html/story-of-mel.html. For a community of people doing this type of thing for toy problems see https://codegolf.stackexchange.com. If you just want to be dazzled by how much people can pack into 4kb binaries when they are really trying look at https://www.youtube.com/playlist?list=PLjxyPjW-DeNWennaPMEPBDoj5GFTj3rbz.