High-end likely refers to professional usage meaning its to win races where every gram counts.
But that aside, less power when tightening means less tightening strength (for what this matters in a chainrings case since the force is likely dominantly exerted perpendicular on the thread), but what also matters is bolt thread wear / material detoriation due to tightening/losening. Steel is quite elastic, aluminium is poor on that. I've had alu pedal cage mounting screws and I've seen them all break after a while, a problem that was gone after I replaced with steel screws. Same story for the bolt / screw heads, tools wearing these out much faster.