[amelius]

Read carefully: I said only rewrite if the code structure is bad. If the code structure is good, then re-architecting can amount to restructuring only the top-level parts.

It can give OP a better feel for how the code is designed, and give them more opportunity to change things in a more structured way in the long term by repeating the process (rather than just fighting fires every time).

[jf22]

Code structure provides very little business value.

Ten year old battle tested spaghetti is more valuable than any benefits a complete re-write would provide.