Hi Maintain,
I agree but mice are a lot more of a problem in a shelter then in your own tent. You don’t have to worry about mice droppings in your own tent nor about mice running across your face inside a tent, never happened to me in I say overall, 200 days of section or weekend hiking. In almost every shelter, mice droppings can be found. One time though, I had a snake make a home between my tent and my tarp, nice surprise when I was packing up in the morning! Shelters are good for when it rains but even then, I prefer the tent, if I have been hiking for 15 miles in the rain, spending another 10 minutes setting up my tent in it is no big deal. Of course, the exception is really nasty weather like hail or hard t-storms. Then I use a shelter if I can get into one but considering two hikers were killed while being a shelter during a t-storm a few years ago by lightning even makes me think about not doing that. I like to see more LNT but let us face the facts, many wouldn’t follow it anyhow and a lot of that is from the day or weekend hikers don’t doing LNT. I always make sure my hands are washed before eating food and I try to boil most of my water and when I can’t do that, I’ll treat the water with bleach or iodine and use sugar-free kool aid to kill the aftertaste (sugar-free koolaid is really light to carry compared to sugared kool aid).
It is just my perference to not use shelters as I like solitude. It’s just my preference that’s all. You’re mileage and conditions my vary.
Peace,

schikerbiker