The first time I bought a home I tried to read it all... after about 3 hours I started skimming... I'd love to see a vote on this board on how many people actually took the hours it would take to read all their loan documents and then asked questions about anything that wasn't clear.
The reality is that people don't do it because it isn't practical. And even if you try, you have to understand something about mortgage lending and are again at the mercy of who is doing your loan to answer any questions you have.