The issue is that it's very difficult to tell trade secrets from expertise in certain fields. In a field that is sufficiently niche, like non flagship chip production - a lot of architectural ideas are well known across the industry are but the implementation details that enable them are trade secrets. You can't "un see" these details and IP law is loose enough that you could easily reimplement those features or products for a competitor without violating IP laws because you've seen the idea before and can come up with infinite implementations.