Grepping and entire code base just to find where some class is defined is certainly doable (I do it often), but it’s not as nice as just right clicking “Go to definition”. Especially in very large codebase with multiple git submodules.

No one serious would assert that inspecting complex data structure, managing breakpoints, stepping through code, or debugging remotely via text mode gdb like it’s 1986, is as easy or efficient as simply using a GUI in 2022, or even 1992.