stdP
One Swiss dinosaur in Polly Gosling's anorak hood
Surely they are completely different. Alien life should be taken for granted, given that the number of exoplanets in the observable universe is of a similar order of magnitude to the number of stars.
Whilst my initial posting probably outs me as an alien skeptic, I broadly agree with you - the chances of other forms of life in the universe, given its immensity, is almost a dead cert.
But the idea that a civilisation advanced enough at the same time as us (who's to say the species capable of this all died out a billion years ago, or won't be around for another ninety millennia?) would expend unimaginable resources to tear across vast resources to eventually come across a miniscule pinprick of a planet in order to put on a show of The Universe's Fuzziest Blobs and their own unique brand of cow-tipping... all whilst only being detectable by the US military/the illuimunati/a slice of mystic pizza yet completely invisible to everyone else. I find it patently ridiculous and it smacks of the same earth/human-centric mindset that got all those astronomers excommunicated.
We only left the gravity well of our own planet a little over fifty years ago. If we'd been able to leave the planet at light speed (currently thought to by physically impossible by most physicists) - so let's be generous and say sixty light years under our belt - by now we'd have made it less than 0.25% of the way across our own galaxy. As Douglas Adams put it, "The simple truth is that interstellar distances will not fit into the human imagination".
The term "UFO" means something more than simply a flying object that the person seeing it hasn't positively identified.
That's literally the definition of UFOs. Don't ascribe meaning that isn't there.