Based on the observations (Humans), they most certainly would. Look around Earth. We're busy shaping this world and there are already structures that can be seen from orbit.
A galatic civilization will create or alter things on a galatic level.
From current data, sentient life is an extreme rarity, so an intelligence capable of altering Galaxies would in fact propbably place very high value on other sentient life and enter their welfare into calculations, so long as doing so didn’t endanger the ‘higher life’. I find it interesting that discussions like this just ignore the testimonies about Angels ... are they evidence of that ‘galactic civilizaytion’? They exist in some where/when we have yet to detect and we only know of them when they ‘step’ into our where/when. I am currently convinced that we will make a significant leap into advancement when we realize there is a temporal reality apart from our perceived one. We sense nothing in the actual present of the phenomenon, so it’s not so much of a leap to imagine a temporal limit beyond our planar present (I call it the volumetric variable of dimension time). Jesus came from and went to some where/when we are not sensing in the physical yet He made these moves with a physical body of some sort.
Beings that would alter worlds at the expense of other life would probably blow themselves up before they got to that level.
John