The only civilizations we have known definitely show that contact involving a great technological difference is usually a disaster for the less advanced people.
https://en.wikipedia.org/wiki/Fermi_paradox#It_is_dangerous_...
So unless they really prize rare meat or have other illogical goals you wouldn't expect any aliens to visit us until its as easy for them as it is for us to take a transatlantic flight... I wonder if they're also arguing that they should stay silent to preserve our culture instead of curing our diseases etc.