If we are a tree, they are the vine.
If we are a rock, they are the lichen.

Sure, if the human race were very suddenly wiped out entirely by armageddon, they would move on, find another species to interact with, manipulate, play with.

Humans are toys. That is the most blunt way I can put it. Toys to humans can be anything from a luxury car to a baby's rattler to a sex toy. We're sort of the same to them, at least in my experience.

In some rare cases, or at least in the VERY FAR past, reptilians and humans were mates. Some couples shared a deep bond for each other. That, to me, is not a "toy" relationship, but a real one, and a healthy one.

Not only that, but we're here to be experimented on. We're an interesting species to study. Like a softer, kinder version of them.