Aliens as advanced species

Question: Why are aliens (from outer space) portrayed as advanced species'?  Just a thought.  I think I know why but I want your opinion.

My Reply:

Because according to what we've seen and discovered so far, there are no planets with life on them, or at least no planets within a lifetime of traveling distance. So in order for aliens to arrive here, they'd have to be from a planet in another galaxy. And if from another galaxy, then they'd have to have advanced technology in order to make the trip here within a single lifetime.

---Pastor Andy

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