Because stronger threads can compress the skin tighter, giving the skier a more efficient aerodynamic profile.
In contrast:
Threads used for stitching? Some threads are more aerodynamic than other threads? A “reinforced” threat is objectionable ... why? This needs to be explained.
At some point one has to wonder if there is any tangible competitive advantage involved or if some people high in the relevant federation have a financial stake in a particular supply chain.
Not that I could ever dream of thinking that international sporting federations are possible corrupt. Except for FIFA, of course. And the Olympic committee. And at the level of major national sports, the NBA, NFL, NCAA, etc.
Aside from that, the world of sports is a bastion of integrity. And never mind the agents hovering around four and five star high school kids.
Because stronger threads can compress the skin tighter, giving the skier a more efficient aerodynamic profile.
In contrast: