Ok, it’s really not a big assumption
any life form is about passing on genetic material to next generation through reproduction. With that comes a need to firstly survive.
all the civilisation, culture, communication etc that would be needed to develop scientific discovery and engineering to warp through worm holes ( or whatever your theory is) only takes precedent once those basic needs can be net
this isn’t a leap or assumption of thinking. The universe can only be made from atoms - we know pretty much all the basic ones , they’re not up for conjecture from your vivid imagination- yep heavy elements still to be found but they’re not being found by us because their too stable . For life you need some reactive chemicals capable of long chain structure- that whittles it down to stuff that the universe is full off : carbon, silicon, nitrogen, sulphur, hydrogen, oxygen etc . Or are you in a world of pseudo science thinking elements can pop out of no where making bonds in ways electrons don’t on earth or our solar system, or our galaxy?
the very way life has to evolve means the basic premise of organisms remains. To reproduce and survive
the most likely common alien out there on the eco planets are single celled, maybe a few bacteria or virus like structures. Well yep, I’m theory they’d get through those teeny tiny worm holes Einstein postulated I suppose .
but hey Ho, if you want to imagine they’re all more like elves or fairies off you go