Why are lowerbloods so abundant?? I know this sounds like a dumb question but hear me out... yes lowbloods tend to have mental powers but they don’t help astronomically. Also, highbloods have a tendency to cull lowbloods while lowbloods killing highbloods is almost unheard of. And it’s not like they live much longer to have more grubs, so why is it such an imbalance??

Precisely because they die a lot more. There’s just more of them to offset their shorter lifespans, while Highbloods can live basically forever so there’s less of them. Otherwise the Universe would be overcrowded with immortal Violets.