I might love you like a plump uncle who does magic tricks brit, but the Borg weren't destroyed.
Sure their nose got bloodied, but if you can't handle a bloody nose, then you got no business being in space int he first place.
The hub was annihilated and a Queen bought it, but more so than that who can tell, because this was a pin prick against a leviathan, and it's more than possible that the Borg were actually inoculated against this Futuretech before it could wisely be used decisively enforce against a target or targets that
would cripple the Borg, since it's odd that the Borg exist in the future where these weapons do come from are all onboard, one would assume, most every federation Ship, but Voyager alone was able to use them to sever the head of the entire collective in one fell swoop?
That doesn't sound right at all.
And us guys, our swimmers, well there's 90 million of them racing to be head of the pack every time we unload and they only live for three days no matter who's body they're in... So even if couples stay together or do it at exactly the same time, down to a hundredth of a second simulclimaxing with an unseen parallel timeline, there's still a huge butterfly in the ointment that the baby making is happening or not happening on polar sides of the galaxy in completely different gravity fields that all 90 million sperm xan even be situated to be treadding in the same starting positions when the race rebegins as they were the first time around, and that's even a bad call if the same sperm is being fired at a different egg, since I have no idea how cutsies and queue hopping works inside the customs office goosestepping regularity at the division of ovary and fallopian tube.
Sure the "new" progeny can be similar, but it's still a dead certainty that any child produced by the same same couples is going to be a brother or a sister of the siblings you'd find in a previously dominant timeline.
But just think about these "couples" from Voyager. They went from choosing a breeding-mate from 70ish members of the opposite sex, to suddenly 90 billionish depending on species.
Some couples are just not going to bother staying together now that they're not left with no choice but the best option from a sampling so pitiful even Kim was getting his wick dipped and heaven help us, but Chakotay was viewed as an "alphadog". Consider how the divorce rate on Voyager after their homecoming would have skyrocketted to about 90 percent given the smorgasbord of opportunity now available?