This is a decent reason, but your original comment is dangerously close to a completely strawman argument of "the argument of the func AverageAge(people []Person) should be called peopleToCalculateTheAverageOfTheirAges because what if I forget the method's name or its purpose while I am reading its text?"

Which, now that I think of it, kinda applies to your argument as well. Yeah, the debugger dropped you into the middle of a function you see for the first time in your life. No matter how you dice it or slice it, this means you'll have to study this function; I personally find that going to the function's beginning and skimming it until the breakpoint is the most reliable (and therefore, on average, fastest) method.