I was reading about gravitational waves and about laser based detectors. I also read this. As mentioned in the answer, when ever there is a deformation in spacetime, doesn't it also create a minute time dilation? So in a laser based detector, even if the distance between the objects change when a gravitational wave passes, doesn't the time dilation affect the time taken by the laser to travel between the objects and make it a constant?
Later I read this What makes us think we can actually detect gravitational waves? as well. But I still think the time dilation argument makes sense.