If you ignore the health effects, asbestos is a fucking brilliant material, strong(if used with a binder) exceptionally fireproof, UV stable and fairly inert.
Why _wouldn't_ you use it? To use modern parlance; only melts wouldn't use it, thats who (this message brought to you by your friendly corporate sponsor...)
The problem is that it still kills now[1]. Because its a time bomb, with a dwell time of well over 10-20 years, its very lard to pin point the cause.
The only way that its _stopped_ being put into building materials is through regulation. The problem now for us, especailly in the UK is the power of regulation is being ablated through incompetence, funding cuts and a concerted effort by those who stand to benefit from a weakened regulatory system.
Most regulation is formed from the blood of victims. We may not _like_ what the regulation is, and lord knows it needs improving. But to not have it, or worst, have it and not be enforced, is a terrible state of affairs.
[1]https://neu.org.uk/latest/library/what-real-risk-asbestos-sc...