I think that’s the implication, but it goes even further than you say: because of the relativity of simultaneity (see Wikipedia), there is no absolute yardstick of the timeline.
In other words, “it happened n years ago”, like “it’s happening right now”, isn’t defined by itself; it only makes sense for given values of here and there.
This comes out of special relativity and is closely connected with the fact that nothing, not even photons, can move faster than a certain speed.
It's interesting — this both appeals to my intuition and is hard for me to completely wrap my head around... I can see it but I realise that I don't naturally think like that.
In other words, “it happened n years ago”, like “it’s happening right now”, isn’t defined by itself; it only makes sense for given values of here and there.
This comes out of special relativity and is closely connected with the fact that nothing, not even photons, can move faster than a certain speed.