> On the plus side, that means we don't have to sweat it so badly with the "right" way to write code and just accept that code eventually becomes one big mess with a gigantic, horrible 50-case switch statement in the middle.

No! No no. No it doesn't. Not unless someone makes it that way. Code doesn't have to become awful. It becomes awful when successive generations of maintainers choose quick easy partial-fixes over a bit of refactoring to fix the problem properly.

Code wants to be short, simple, clear, and easy to understand. People make it horrible by not caring (or by not seeing patterns).