Well, I hope, at the end of the day, you *do* care if your (maintainable etc.) code works... ;-)
fixing maintainable code is a breeze.

Have you ever had to fix unmaintainable code that "worked"? It should be included in the dictionary under 'nightmare'.

A classic example from my experience is that once I were requested to fix a glitch in somebody elses code. "Somebody" was still with the company, but had changed departement. Here is my recollection of the exchange:
E: "why are there no comments?" S: "they take time and are not needed in working code"
E: "but the code does not work" S: "It did, not my fault"
E: "but no changes have been made" S: "then it must be hardware"
E: "it seems to be in this routine, what is the purpose of ...?" S: "I do not know, I forgot"
E: "how do you fix your own code" S: "I do not need to, it works"
E: "I will ask management to assign this fix to you" S: "serves no purpose, it is hardware, my code works"

I gave up and rewrote, from scratch. the entire code and "fixed the hardware problem without opening the box".

Erik