Well, one important detail about the RCV is that they were possibly the largest vamp court and maybe had the easiest and fastest way of converting mortals into supernatural creatures.
We don't know this at all, and we have circumstantial evidence pointing very much in the opposite direction.
For one thing, we know from WoJ that the White Council first became aware of the Red Court about the time Europeans were exploring the Americas. Which means that if the Reds were building their forces towards being able to take on the White Council, they were very slow about doing so. Certainly slower than the Council could; Luccio mentions in Changes that by that point the Council had twice the strength in the field they had before the losses of DB, and that took them five years.
For another, possibly the most important datapoint about supernatural predators in the DV is one that Harry is by definition incapable of realising. The bit early on in DB where Harry explains to Butters about the numbers of human beings who go missing. Where he is quoting
real-world numbers exactly.
The DV has organised crime. The DV has abusive families and runaway children. We've seen these in the text. We have no reason to believe that these and other reasons why people disappear are any different as facts of the DV than they are in RL.
Which means that the
actual impact of supernatural predation on humans in the DV is
statistically negligible. There's hardly any of it.
We've seen one human partially transformed, and that took at least one Red Court noble and possibly a whole houseful of other Red Court to achieve.
The other major piece of evidence here, fwiw, is that Harry entirely understands the dangers of exponential growth among enemies, and explains it quite cogently to Murphy earlyish in BR when talking about the Black Court. But neither there nor anywhere else does anyone apply or suggest applying that model to the Red Court. To my mind, that strongly suggests that it does not in fact apply.