No E.T. contact yet means singularity unlikely

We may be approaching the singularity, where a potentially exponential technological ascent could quickly render humans a powerful, competitive threat to other civilizations in our galactic neighborhood.

It would be in the interest of aliens to watch over and guide up-and-coming intelligent species as they approach this singularity to ensure their own safety.

If this is indeed how extraterrestrials behave, since we have not yet been contacted, we might argue that, to date, we have not developed the necessary technology or made the necessary scientific discoveries required for the singularity.