Its easy to take a telescope to a fruit bearing tree, point at the roots and say look its sucking out all the nutrients from the soil.
I do not condone abuse of any system, including visa/gc system, it should only go to those that truly are builders and contribute to growth of the overall system and not act as parasites, but that's a trait not exclusive to just the people (some targeting is probably legit) you're targeting.
It is a fact that many immigrants have played a pivotal/transformative roles in many different industries and their booms, nothing as great as the tech boom though. It is one of the few core engines of US staying on the frontier, but not the only engine.
I do not condone abuse of any system, including visa/gc system, it should only go to those that truly are builders and contribute to growth of the overall system and not act as parasites, but that's a trait not exclusive to just the people (some targeting is probably legit) you're targeting.