Hi Djork,
It seems that you've received several answers to why you would replace a working lightbulb, some useful, some fanciful. Here's a non-compensated-testimonial.
I have, in fact, used the Ove Glove for JUST THAT PURPOSE (multiple light bulbs in a basement changed all at once, 'nuff said)! I have the "new and improved" silicone augmented type. I use them for soldering projects, cooking, baking, BBQ-ing, (CHANGING LIGHTBULBS), etc. I have 3 because one is in my trunk, used for working on my car (no more burned/bashed knuckles)! My Mom and Sister are each getting a pair for Christmas. They asked for them when they saw me using mine.