No, thats a common mechanistic view of building software but it's not really accurate. Unlike with bricks, the way you arrange your components and subcomponents has an effect on the entire system. It's a complex phenomenon.

Of course your view is quite common especially in the managerial class, and often leads to broken software development practices and the idea that you can just increase output by increasing input. One step away from hiring 9 pregnant women to make a baby in a month.