First look and somewhat worried

After doing my research and reading about TrailManor, I got my first hands-on look last week. I had been reading about the velcro strips and wondered what people were talking about. The salesman made the mistake of pulling up the strip in the front by the door. I had assumed that the bottom of the shell had some kind of U shape that came up and partially sealed the unit. Was I wrong. I looked down between the shells and saw the ground. So, there are several inches that this velcro padding must cover and seal against weather, insects, and anything else I don't want in the trailer. Can someone just put their arm up from outside, push the velcro aside and reach anything? Keep in mind, I only saw this opening a brief second until the salesman closed it. Should I worry about this or is there something I don't know?