Understood. I kinda have a preference to them just to keep the stuff in my stretch pockets dry, keep the pack from getting heavier, keep everything from getting muddy (and in turn my rear) if I set the pack down. I keep my cover in a stretch pocket right next to my rain jacket…so if I'm getting my rain jacket out anyway…
Additionally, most often than not if it's raining, then I'm using my GoLite umbrella and have it stuck into my pack strap. This then covers not only my head but the entire top of my pack. I just started using an umbrella this year and cannot even begin to tell you all the perks and uses for it…and envy from others on the trail. I can't explain how nice it is to hike in the rain for 3.5 hours with your hood off of your head, still be able to take pictures, not constantly be subjected to Chinese water torture, do your business while staying dry and even just being able to sit under it's cover while eating or making a meal.
…even makes a great awning on my BA Fly Creek UL 2, allowing me to keep my vestibule open in the rain and remedying BA's design flaw.

