Could abductions be a preservation program?

The Earth has a good ability to sustain life and yet it also goes through cycles that destroy much of that life. Humanity may be "not long for this world", either through a natural event, or because NHI decide that "sometimes the Earth's children cause too much harm, and have to be reduced to presrve the qualities of the larger ecosystem" (which may include Earth and, as a future consideration, beyond).

If we are "going the way of the Dodo" could the NHI be doing abductions in order to preserve (in living form) our genetic stock, to ensure that, even if our path may have ended up misguided, our evolutionary tree is preserved and lives on as a contribution to other species?

If NHI knew of such impending doom, they would likely not tell us, but continue sampling DNA up to the critical moment.

This occured to me upon reflecting that there's far more life out there than us; it's about more than just us; and we are likely not the first civilizational species to arise on Earth; and, if there was some sort of NHI management, would it not be possible that one of their considerations might be: "do they do more harm by existing or by not existing?"; and if we were headed out, might not NHI try to "save us" somehow, and might not abductions be a way to save our genetic legacy?