Your comment is so fit for purpose, displaying such a massive willful ignorance about the world in general. Because the biggest problem with asbestos wasn't using it for home insulation. It killed millions of workers in manufacturing plants and mines. Its biggest industrial use case was for electrical insulation of high voltage transmission lines. Where it also killed hundreds of thousands of technicians in the us alone. Before that it was used for lamp wicks. Where it killed at least a couple of millions more over a century. Today, asbestos kills 250 thousand people a year, 12 to 15 thousand in the us every year.

I supposed any tool can be considered useful if you're ignorant enough about it or if you're willing to lie without remorse.