Just go with the whole quote plese... "We see the solar system and we can calculate at what rate it ejected rocks during its history. And if we assume all plan

Just go with the whole quote plese... "We see the solar system and we can calculate at what rate it ejected rocks during its history. And if we assume all planetary systems around other stars are doing the same thing, we can figure out what the population of interstellar objects should be. That calculation results in a lot of possibilities, but the range is much less than needed to explain the discovery of ‘Oumuamua." That is freaking broad assumption. What is history we can calculate at what rate it ejected rocks? Last 100 years? Last 2000 years? What about younger systems? Did they calculated it for whole lifetime of solar system? I am quite skeptic because you know those scientists need to get paid and probably if you are just looking at stars you are not paid enough... Because mostly nothing interesting happens there.