It is entirely possible, indeed probable, that life exists...

It is entirely possible, indeed probable, that life exists outside our solar system.
Is it likely that any of these life forms have achieved interstellar travel to the extent that they visit the Earth?
Even for those with advanced technologies, this would be a huge challenge. So far evidence for advanced technologies remains speculative with, at best, easily described not so dramatic alternatives.
We know enough about terrestrial life forms to be able to confirm or otherwise through genetics whether a lifeform is alien or not. So far nothing is offered.
I find it of interest that claimed alien life forms and alien technologies match those found in children's comics.
I wait with interest for more concrete evidence that there is alien life among us as is claimed.
Until then I shall continue to regard such claims as interesting speculation.