Guys, hear me out for a second

Nope, Fermi’s Paradox.

www.space.com/25325-fermi-paradox.html

Although, Azeroth could still be considered “primitive.” So they’d have no way of contacting us (or being close enough to receive our radio waves.)

But see, case in point:

You would not want Sylvanus to know we were here. She’d enslave Gnomes/magic to get here and easily overtake our planet of “mundanes.”