Taking torrification out of the equation for a moment, yes—there are a number of factors at play.
The quality of the timber has already been mentioned. A piece of maple for a neck on a £100 guitar won’t even be in the same ballpark as that used by a top-tier brand like Shuker.
Not all truss rods are created equal, and some have been found to be prone to failure in cheaper instruments. Poorly cut channels and ill-fitting rods can mean the truss rod is already operating outside its effective range.
How is the neck wood cut? Is it quarter-sawn, for example?
Is the neck laminated, and if so, what laminates are being used? This includes the fretboard. I’d describe this as a cross-grain laminate, since the fretboard grain runs perpendicular to the neck laminates, offering additional resistance to twisting and lateral movement.
Is the fretboard a thin veneer, like on my cranky old P Bass (a “ball-bat” neck I’ve adjusted once, and it’s rock solid), or a thick cap? What timber has been used?
How much of the neck length, up to the end of the fretboard is attached to the body? On a standard P Bass, it’s from around the 16th fret onwards. Some neck-through basses join the body at the 24th fret. On a 35" scale-plus instrument, that’s a longer length of neck for forces to act upon. We know from school physics it’s easier to bend a longer piece of material than a shorter one. I’ll leave the exact term for that to the physicists—Beam Theory, maybe?
I also read about a guitar tech who highlighted issues caused by fret installation itself, which could effectively add uneven backbow to an otherwise relaxed board.
I’m sure there are plenty more reasons why necks move around, but these are the ones that came to mind while having a cuppa!