The universe is big not only in space but in time. The human race has been around for less than the time span of an electronic flash. And it’s about to expire. There could be thousands of such flashes going off all the time, but the likelihood of two going off near enough to each other at the same “instant” are mind bogglingly low.
It might be like that, but we only have one example to look at, us. So it seems to me assuming anything about how long species/civilizations might last to communicate with each other is going to be based off that example of one.
For instance, if a hypothetical species has 100,000 year lifespans as opposed to 100 years, it probably becomes more feasible. Likewise if the drive to explore is super rare among hypothetical species, it doesn’t matter how long their civilizations last, they just won’t look or explore in the first place.
Freegards