Technology

Absolutely, based on the information we have today.

Right. You have to dream up counterfactual fantasies in order for it to be a problem.

That dark swarm of asteroids that was launched out of the Magellanic Cloud 8 billion years ago that's coming on a direct collision course against the Milky Way rotation - yeah, we don't know about that one.

And you don't need to worry about it, because as I said, the human mind is very bad at intuitively grasping the implications of very large or very small numbers.

Go ahead and actually calculate what risk there might be from something like this. How much mass do those asteroids have? What's their collective cross-section, and how does that compare to the volume of space they'd be passing through? How big is Earth in comparison?

I'm betting the odds will still be microscopic. I feel safe betting that because we have real world evidence that bodies in our solar system don't frequently get hit by ghost asteroids from the Magellanic Cloud (there's an 80's sci-fi movie title for you). Large impacts are few and far between these days,

That we know of the mechanism that produced the burst.

Once again, sure, you could imagine that ordinary stars sometimes miraculously pop like balloons to spray us with liquid death.

If you want it to actually be a worrying scenario, though, it needs to be backed up with some kind of evidence or theory that makes it plausible. And again, we don't actually see frequent gamma ray bursts in reality, so whatever mechanism you propose needs to be rare for it to fit the data.