Most likely Concordance's geas against artificial modification was left over from some earlier age when the tech was unreliable, dangerous. Or maybe they feared those with amped-up transhuman abilities.

So on the morne Sir Trystram, Sir Gareth and Sir Dynadan arose early and went unto Sir Palomydes chambir, and there they founde hym faste aslepe, for he had all nyght wacched […]

Several sections in that book are really confusing.

The bigwigs of the agency will make the presentation that will win your heart — and your business. But the smallwigs will do all the work.