You need to be able to get into and out of a tent with some amount of ease. If you can't, you end up either grasping for support from the tent itself (which is can't offer) or falling on it. This is especially so after a long, hard day, when you might be dehydrated. Many is the time I have crawled into a tent and ended up with severe thigh cramps (bad on-bike management, I know, and I have learned).

Consider also the need to get up at night to have a pee outside... you need to be able to facilitate that with some high degree of efficiency.

I won't go near trying being drunk in charge of a tent. Or maybe I will... there is a tendency to lean and fall, and that broke a fibreglass tent pole on my first long tour. I learned that lesson quite well early on, too.