No, they're not objecting to the distances in that quote. They're saying that the STO plotline is acting as though no civilizations of any significance live in those gaps. That the only civilizations that matter along Voyager's route home are the ones that we actually saw on Voyager, and because Voyager managed to skip over some vast regions of the DQ, that nothing of importance must exist in those regions.
Thanks, I understand now. Still, it's not a matter of importance/notoriety of species. STO left out the Krenim and Devore in the gameplay - clearly important people.
We just don't get to meet everybody. And that's endemic of Trek. After all, how many episodes introduced a suddenly-important empire and barely referenced them again? I'm thinking Tzenkethi, Sheliak, Tholians, etc.
The same 'plot hole' can be found in real life, where news focus on major or otherwise notable countries. When was the last time Slovakia, Guatemale or Papua Newguinea were in the news?
Btw, I finally got my hands on the Star Charts last weekend. STO based its DQ directly on the maps. I was surprised how there are 20,000 ly between Devore colonies.