It’s an interesting thought, but an alien race could be more like hive insects and are just sending out ark ships as part of an instinct to survive and thrive in as many places as possible. Like the aliens in the Ender’s game series.

Or like the race that created the Protomolecule in the expanse, they sent a probe into a system that looked promising possibly even before humans existed and had no way to know if it had intelligent life and their probe is basically going to autonomously consume organic material as part of building a highway off ramp.