While a planet that rains molten glass seems hostile and inhabitable right now, technology can be invented that changes that perception. For example, space travel (with the lack of oxygen) seemed like a hostile environment. But through research and technological advancements, the space suit was created to allow for people to be able to live in the outer space environment. In this same way we can use technology to make now inhabitable planets habitable to us.
These are one of the very microscopic discovery of the Human Technology of these Universe and Multiverse.. There are things and lifeforms that are existing right now and lurking in the deep corners of distant space that we will never know in our lifetime or many more future lifetimes. The Multiverse is so tantalizingly ahead of human perception. We can only try to fathom a fraction of this enigma, even as more and more processes become evident every passing millisecond!
technology one day allow us to travel to planets with hostile environments. It is a simple maxim that technology will constantly develop. In all likelihood, scientists will devise of technologies that we cannot possibly even fathom at the moment. Whatever they come up with, it will need to address the vast distances that must be covered.
Maybe not the plantet with molten glass rains, but we are developing technologies that allow use to travel to hostile plantets already. Engineers are helping people to travel to a mars someday. Mars is a very unhospiable plantet, and many people thought we would never get there, but it looks possible.