Because it's not a problem. So everybody does the same. And is not about the programming language, is about the programmer's choice. If it wants debug info insi

Because it's not a problem. So everybody does the same. And is not about the programming language, is about the programmer's choice. If it wants debug info inside a production program, the language let it happens. In today's age size of your executable is a non-issue. The only issue should be your performance. Here is an example from my past. As embedded programmer I went and added manually a hundred lines of constants, which initially were just an array generated at start and increased that code by about 5%. Why? Because I gained 5 ms in execution speed. And in embedded world that's huge. Especially when your code is executed on the lowest 10 ms cycle. So the department head approved such a huge change because the code size doesn't matter, you can always buy a bigger chip, but if your car don't start because the watchdog keeps resetting your car's on-board computer then speed in code execution is everything.