I can think of many reasons we might never have been visited besides the apparent difficulty in travelling the distance to get to us. Why does the distance problem have to be the right one for you?
Freegards
I don’t think people fully appreciate just how vast space is. The nearest star is over 4 light years away. That’s 186,000, times 60, times 60, times 24, times 365, times 4 miles away...
That’s the nearest star.