The reported alternatives exist in considerable variety, Shimrod. Rather than asking me about it, why don't you read many of the interesting literature that is out there about reported sightings. Now, most sightings do not involve people seeing the occupants, only the vehicles, but there have been sighting of occupants too and as I say, the alternative descriptions of same have varied quite a bit.

This might well indicate that we have been visited by not one lot of aliens, but several different lots of them. Why should there be only one lot of aliens capable of interstellar travel? Would there be any particular reason for only one? I can't see why. If there are any, there may be many. Some may be humanoid in appearance, and some not. Why should we assume they're all humanoid? On the basis of what? Why should we assume they're not? On the basis of what?

Why should we assume anything about it? On the basis of what?

The assumptions most people make about stuff they don't actually know about firsthand are nothing more, usually, than an assumption they picked up from other people....who picked it up previously from other people.

In other words, the parrot repeats what it has heard others say. This is all most people do.

If you ever have the actual experience of seeing an alien craft...or of encountering its occupants face to face, then you will no longer just repeat what others have said. You will KNOW something about it from that point on. That's a whole different ballgame from making assumptions based on other people's assumptions based on other people's assumptions, which is all most people ever do.

Many things are deemed impossible...until they are done. Many other things are deemed highly unlikely...until they have been done and people have gotten used to them. Then they are deemed quite "normal", and are not seen as unusual anymore. They are taken for granted, just the way you or I take radio or TV for granted now.

Such will one day be the case, I'm sure, with interstellar travel...just from our point of view as Earthlings, I mean. I'm sure that for some other beings out there it is as normal as it would be for us to drive the car downtown to the mall. If so, they probably look in on a lot of different planets as much for curiosity and scientific investigation as for anything else. They probably find us kind of interesting...if not too terribly important in the larger scheme of things.