Not exactly sure where you are located but your name gives me a possible clue. For questions like this, might I suggest you modify your profile to give us a better clue to your weather.
I don't know what your coop looks like. For one of those tiny elevated coops, outside access makes sense.
I put in outside access to my nest boxes and almost never use it. I've got a walk-in coop so it is just as easy to go inside. I also like to check on things inside the coop when I collect eggs. Once I found a dead hen. Another unrelated time, I found a big black snake that was eating eggs in the middle of the afternoon.
When pullets start to lay, they will often not lay in the nest boxes. Sometimes they drop them from the roosts or on the floor. You'd never know that if you don't go in.
You can overcome these potential problems by proper construction, but outside access can be route for predators to get into your coop. Unless they are constructed properly, they can leak in a rain. Hens normally like to lay in darker places. I know, who has normal hens. Anyway, depending on how they are constructed, they can let in light which "might" cause a hen to not want to lay in the nest.
If you have a mean rooster and small children collecting eggs, it may protect them from the rooster.
If you are worried about stepping in chicken poop when collecting eggs, you need to change your attitude and wear old shoes.
When I have a broody on eggs, I sometimes find the outside access to be convenient.
Every one of us has a different situation. There is seldom one right answer for all of us on any question. Sounds like you are trying to gather information to make an informed choice for your situation. Good luck!