“If” is a small word for a very large and important concept.  

It brings to mind the idea of choices and consequences.  It’s not about being told what you are going to do and demanding that you obey.  Instead, it offers options and consequences for those options, allowing you choose the path that works best for you.  For many people, it is important to know what the results are expected to be.  

“If” is about respect instead of power. 

If you make good choices, you can generally expect good things to happen. 
If you make bad choices, you can generally expect bad things to happen.