They may just consider us very young. You only tell a child things it is ready to handle. Arguably we’re not ready to make first contact. It has a high risk of leading us to war, the equivalent of a child throwing a tantrum.
On the other hand, the aliens might not care, any more than Europeans cared about African or Mesoamerican cultures. The aliens may simply show up and consider the world to be theirs by their version of divine right.
What is so special about earth aliens might be interested in it in the first place? You could argue sentient life - or even any life - is even rarer than any other kind of matter.
Several science fiction pieces have been written and filmed about alien cultures only finding value in other species' history, stories etc for their entertainment.