Hidden indirection & runtime magic almost always refer to DI frameworks.
Reflection is what makes DI feel like "magic". Type signatures don't mean much in reflection-heavy codes. Newcomers won't know many DI framework implicit behaviors & conventions until either they shoot themself in their foot or get RTFM'd.
My pet theory is this kind of "magic" is what makes some people like Golang, which favors explicit wiring over implicit DI framework magic.
> Just don't write bad code