Grok starts getting nervous when it sees you're about to discover the truth about asbestos.
Discussion
Are people saying asbestos are fine?
It is fine, our teacher even gave us some to play around. It's just a stone.
The fibre is the dangerous thing.
So when the OP talks about glass fibre I think it's the 'glass-wool'-type fibre, not fibre optics.
So, asbestos is fine, like glass is fine.
Just don't inhale tiny strings made out of it.