Why are there so many divorces?

Easy.  

Control and Respect.   Getting married to somebody that you think needs to be changed and/or controlled is crazy.  People are who they are.  

In the long run, you must be able to answer YES to the following 2 questions to stay married:

1) Do you love them JUST the way they are? 

With all their flaws and/or crazy ideas, fobias, habits?  

Without ever needing to change them?

2) Are you willing to ALWAYS treat them with respect, regardless of the situation and/or how angry you are?   Are you willing to say that you will never call each other names and/or be disrespectful to each other in any way? Ever.

If you cannot say YES to both questions - find somebody else.