Deep spacers can find us whether we radio them or not and. I imagine, they also would prefer to mine resources in smaller bodies - gravity wells are huge resource consumers.
It's not very likely they would like to touch the Earth when there is so much water, carbon and miscellaneous metals on the Oort cloud for the cost of towing them into your processing facility. It also spares them the need to enter lower orbits around the Sun. We don't see it as a gravity well because we are at its bottom, but if a deep spacer could choose, he would probably not enter it.
I suspect that sufficiently advanced deep spacers who intend to remain undetected, can. I also suspect that many races will conclude that this is the best strategy for long term survival.
It's not very likely they would like to touch the Earth when there is so much water, carbon and miscellaneous metals on the Oort cloud for the cost of towing them into your processing facility. It also spares them the need to enter lower orbits around the Sun. We don't see it as a gravity well because we are at its bottom, but if a deep spacer could choose, he would probably not enter it.