It is no coincidence that both Themyscira and Wakanda were hidden societies. They both knew what would happen if white men found them thriving.
AHHHHHH!!!!
The tea is PIPING
The fact that the second that a white guy shows up in Wakanda or Themyscira is the second things start taking a turn for the worse is the single most realistic thing in any superhero fiction because history has proven that yep, that is definitely always the case