Not for newcomers to the codebase. Approaching an application that is forced to make the entire application clear as day (as in Go) is so much easier than such Java codebases because I can just read the code and see what it does. This is just my experience though. The Java codebases are always fine as long as I have read several pages of documentation first, which I've learned to do for those cases.

I've seen devs write caches that were shared between customers because they didn't understand the lifecycle of Spring Autowired dependencies.

Understanding how the framework wires things together is important.