For some people they dont have a yard and it is good for your snake to get some natural light and fresh air on occasion, especially if your snakes live in racks where they get less light. I wouldnt walk it down the street like a dog but if you can find a nice big open park where you can keep to yourself then there shouldnt be a problem.

I like to do alot of natural photography with my snakes in different nature setting so I go to different parks all the time. Some parks have nicer trees some have nice rocks, etc, so I take mine out for photo shoots.

If you take them out go prepared with a proper transport bag so they can be put safely away at any moment. I also take fresh pillowcases, water, disinfectant and papertowel just in case a snake messes thier carrier.