Because growth eats everything. Even if your economy only grew at .1% per year that would still mean a doubling every 720 years. For our 15k doubling species that would be a bit over 20x. About a million fold increase.
Secondly we don’t see evidence that they did mine out uninhabited systems. There are over 5,000 exoplanets found that are terrible candidates for life. Yet they are there. Not used.
Third our system alone. Life would have been fine without Saturn. Even if our aliens are nice they still could have snagged that and not really impacted us.
Because growth eats everything. Even if your economy only grew at .1% per year that would still mean a doubling every 720 years. For our 15k doubling species that would be a bit over 20x. About a million fold increase.
Secondly we don’t see evidence that they did mine out uninhabited systems. There are over 5,000 exoplanets found that are terrible candidates for life. Yet they are there. Not used.
Third our system alone. Life would have been fine without Saturn. Even if our aliens are nice they still could have snagged that and not really impacted us.