I hope my answer to
Armagelipsis-matíasmaurán partly helps to answer your question...
Totally agree with youngest individuals, but I think choosing the sickest is only partially true. In the wild, predators prey on the sick because the predator's survival is at stake and sick prey is easier to take down, a predator cannot afford the luxury to expend lots of energy taking down a fit healthy faster stronger wildebeest, for example.
For a discerning predator, an Ideal choice of prey for would be a fit and healthy one because the meat is better quality, much in the same way we as humans pay more for organically reared beef, for example; good healthy beef stock grass-reared with the sun on their backs
roaming "free".
With that in mind, I think this is one of the the
lesser reasons why 4D STS will always remain largely hidden from us so as to continue allowing us the illusion we are "free" at least collectively - of humanity being self-governing, in charge of our own destiny - even if its seen as greatly mismanaged by most.
Our belief in genuinely being 'free' as a species enriches our souls, to a degree. A soul that 'knows' its imprisoned makes for a diminished soul, and emits lower, inferior, energy vibrations (just look at zoo animals). The meat is lower quality.
So, I think 4D STS desire a certain raised level of life-force/energy of soul vibration in line with a certain level of raised conscious' awareness. The higher the conscious awareness of a soul, the greater the energy output-potential of higher vibration content making for greater sustenance to vampirically feed off. We humans are often 'dis-eased'/sick
because we've been vampirically energetically sucked
after the fact -
not before.
Keep in mind also, 4D STS don't feed off of psychopaths because there is nothing to feed off! Organic Portals are of a similar vein in this regards, though, OP's do, of course, have some soul-energy - certainly
much more so than a psychopath in having only the faintest imprint.
However, I'd imagine OP souls are like the 4D STS equivalent of junk-food catering the Lizzie lower castes. Feeding off an OP soul would probably be a bit like having to settle for a Big-mac or eating at Pizza Hut. The Lizzie 'aristocracy' get the organically-reared choicer cuts... They get to go eat at the Michelin star restaurants... Those choicer cuts are those of us who have developed certain soul-growth potential beyond OP level but not yet reached a higher enough vibration as to be out of the predators reach altogether. This is a reason why we must commit FULLY once deciding to commit to doing the Work and to keep on STRIVING. Fence sitters make a good day for snipers, as with a very bad case of splinters... But not least to be made into a Raymond Blanc 10 course special.
This whole 4D STS feeding thing is particularly interesting when we think of in terms of religion and the shaping of our mores and values. The religions given to Man are for the most part machinations of 4D STS - but they have the flecks of the STO principle within certain doctrines. We may like to think that's down to the 'goodness' within humanity shining through and putting a candle to the darkness. That is likely a factor, for sure. But, another angle... I think one of the reasons organized religion serve 4D STS so well is because religion ensures souls are kept at that 'Goldilocks Zone':
Not too hot, not too cold.
That is, to not have us so spiritually deprived/depleted as to be that of primates offering little soul substance, but to not have us, either, elevate too higher in spiritually as to break free of the STS net all together. Its a balancing act. I think thats a reason most religions have such contradictory teachings. On the one hand they teach forgiveness and tolerance and offer salvation - ie the raising of vibrations above that of spiritually malnourished cavemen, but on the other hand religion is also the primary tool to espouse intolerance ignorance and to exact wrathful punishment - ie to lower vibrations back down again to within the predators reach.
@Lathyrus thanks, I stand corrected.