Don't feel bad at all about having your coop built. Be happy that you can! There's no such thing as cheating if you're getting chickens out of it.
We divided our hen house into two separate areas: A people side where we can walk in and open the nest boxes to get the eggs without the chickens being able to get onto that side.
And the other side is, of course, for the chickens. There is a door into the chicken side that just has chicken wire on it (not predator proof but it's inside the hen house so that is predator proof) so that I can get in to fill their feeder and waterer and clean.
The biggest two reasons we chose to have a divided coop is 1) so that we could get our eggs from inside, thus not having to stand outside in freezing, bitter, cold, snowy or raining weather and 2) so that if the kids accidentally (and they have) leave open the nest boxes the chickens can only get onto the secure people side and not outside where my dogs could get them.
It is a personal decision on which way to build your coop. Others will give you their reasons for building the way they did. You need to decide what works best for you and do it!
Here a some pictures of mine - just to give you ideas.
The first picture is looking into the 'people' door into the coop. The door into the chicken side is immediately in on the right - it isn't there yet in this picture.
This is with the top nest box door shut...
This is with the top nest box door open...
Have lots of fun...