The Namuh species consists of highly-intelligent organisms who have developed interplanetary travel and have colonized their home star system. Their science base has an excellent understanding of general relativity, to the point that they're capable of taking a few kilograms of plasma and generating an Alcubierre-style "warp field" that allows them to travel through warped space faster than light, and even produce gravity effects on small scales to produce what we humans would identify as "magic". So long as the wielder can calculate the necessary energy densities to produce the gravitational effect, they can apply their super-special "Namuh operator" to the energy configuration and produce another configuration that generates the exact same effects but doesn't require nearly as much energy. Important note: they never develop AI, so the only sentient thing they will ever have access to is themselves, living and breathing.
However, there's a catch: due to Insert Your Difficulty Here, sentience - and immense intelligence - are required to effectively use this "magic" to telekinetically kill a boar from 200 yards with gravity bullets or figure out how to program a ship's warp drive to take them to the next star on the left instead of imploding. That means that the young of the species, who are more simpleminded, aren't very good at "magic" and spend much of their time just being normies, the middle-aged adults, who are learned in the ways of tensor calculus, are more capable of effecting gravity and warp effects, and the elders are powerful mathematics who are more than capable of calculating a route through space or inverting gravity in a certain area at a whim.
The core aspect of this technology is that it cannot be efficiently executed by computers: set a computer just as powerful as the Namuh mind on the problem of lifting a cup with a warp field, and it'll run for hours, but a Namuh decently-well trained in the ways of nonlinear partial differential equations can think for a moment and then raise the cup high into the air. Computers can solve the trajectory problem and program a warp drive to take a ship between planets, but at longer distances the calculations start to break down, and if a computer is put in charge for too long without a Namuh mind to intervene, the warp drive will just straight-up implode.
Why is this? Why does manipulating the warp field and effecting magic and route calculation require a sentient brain to work?
Any and all suggestions appreciated! If any specifications are needed I can add them too.