How to Be Lazy and Stay Calm

What frustrates me most in my profession of software development is the regular necessity to understand large problem scopes before fixing small bugs, especially if the code is legacy and not mine. Actually, it's even more frustrating when the code is mine. The "deep thinking," as they call it, which is always required before even a small issue can be resolved, seriously turns me away from programming. Or did turn me away. Until I started to think differently and encourage mysel...