I believe! Our galaxy is young compared to many....which means older systems,older planets,older civilizations which could lead to more advanced technology. Could they travel here? Outlook not so reasonable. If anything, I'm sure they don't look so Hollywood or even quite possible they could be tiny organisms still.
yes i mean everyone is going to think i'm crazy but here me out how could there be a huge infinitely expanding universe with only one planet that has life the possibilities of that are probably 1 in 1 googolplex (googolplex is a name given to an insanely large number)