A couple things that come to mind.
1) Back then C programmers were likely in their prime. Hell, even "I" still remembered...some of what I learned in HS/college. OOP wasn't really all that old and probably not as understood yet, so they stuck with the procedural methods;
2) We ALL knew about Spaghetti code...painfully so;
3) I can see what the others are saying about the pic. At first it was kind of amusing, but to those now a days that barely know how their computer works that probably makes no sense. Now that the world is a meme, it has even less impact or worse, comes off as snark. TBH, I'd maybe stick with your (very detailed) responses and leave the pic alone at this point. Maybe a relatable meme or three instead.