Somewhere, I have the weight of my tent and sleeping gear written down, somewhere.
Being snug and dry in your tent, in a heavy rainstorm is a very good feeling, and leads you to decide that what ever you paid for the tent, it was worth it.
Here, in the Northeast, in the Summer, it is rare to go three days in a row without some rain, and even if it stays dry, the biting insects make some sort of shelter important.