Even if the AI is right...
a) it means the asteroids will pass within 7.5 million km, a target area of 177 million sqkm. Earth diameter is approx 13 k km. Even considering anything as close as 20k km as a hit (which goes far beyond the atmosphere and LEO) gives a target area of 1.25 million sqkm. The possibility of a REALLY close shave, is less than 1%. The possibility of an actual hit on earth is less than 0.3%.
b) even if one of these hits....
"For perspective, Tunguska object which flattened 2,000 square kilometers of forest in Siberia was estimated to have a diameter of between 50 and 80 meters"
Let's say a 100m asteroid can flatten 5,000 sqkm. Earth's surface is over 500m sqkm. So it would affect 0.001% of the Earth's surface. I also don't think I have ever seen any reference to atmospheric fallout from Tunguska, so the effect would probably be very localised. Unless it's a direct hit on an urban area, it's not going to be much of a problem, certainly not existential-level to the human race.
Now, if you're talking 1km + asteroid that's something else altogether