This has been my thought too. Humans are already talking about a robotic science mission to the Alpha Centauri star system. Checkout Breakthrough Initiatives Starshot.

If we believe there are other goldilocks planets and have advanced life ahead of ours then I could find it reasonable that they could be sending robotic science missions to other star systems.

https://en.m.wikipedia.org/wiki/Breakthrough_Starshot

https://breakthroughinitiatives.org/