If these craft can accelerate and incur 1000+ Gs, then interstellar travel, even galaxy edge to galaxy edge, is possible, within even a human lifetime, due to time dilation inside the craft at the speeds it would get to. (just under 3 months to the occupants if my math is right, and 100k years to entities outside).
If the beings that made these craft are here, in a random 'nothing special' place, then they are everywhere. For us to be their first rodeo would be statistically not likely.
If they are everywhere, they could have been around for a looooong time.
The report said some encounters use EM signaling.
We have never seen signals from outer space. They must be there, but we never s