I should have been clear. Yes it is avoidable but only by adding more checking machinery. The bare language doesnt help. In Go etc. If a struct doesn't a field

I should have been clear. Yes it is avoidable but only by adding more checking machinery. The bare language doesnt help. In Go etc. If a struct doesn't a field foo then there will not be a field foo at runtime. In JS there might be. Unless you bring in libraries to help prevent it. You are relying on someone remembering to use zod on every fetch