IMO a lot of (software) engineering wisdom and best practices fails in the face of business requirements and logic. In hard engineering you can push back a lot harder because it's more permanent and lives are more often on the line, but with software, it's harder to do so.
I truly believe the constraints of fast moving business and inane, non sensical requests for short term gains (to keep your product going) make it nearly impossible to do proper software engineering, and actually require these if-else nests to work properly. So much so that I think we should distinguish between software engineering and product engineering.