So because his particular tool (or use of a tool) adds inconvenience or overhead means the entire concept is bunk? Don't confuse the thing with the concept. T

So because his particular tool (or use of a tool) adds inconvenience or overhead means the entire concept is bunk? Don't confuse the thing with the concept. Tests are double checking your work. ("Yup. That condition I said would be true still is!"). The tighter and more lightweight we can get that feedback loop going the better out output and the more confident in our work we'll be.