Compared with our other US female pair skaters, I can't think of many who are consistent with their triples. That goes for the men as well. Otherwise US pairs wouldn't be mired in mediocrity that they as a whole keep trying to emerge from
I agree with you to the extent that the most glaring problem in watching your typical elite US pairs program on an international stage is their inability to complete SBS jumps.
But, many other international teams screw up their jumps and still outrank top American teams. I would rank jump screw-ups a big problem for anyone. If you were to ask me about what element Sui / Han would most likely screw up on, it would be a SBS jump. Yet, they are champions.
Why? IMO, the top reasons are (1) better, basic SS like speed and posture; (2) sheer strength on other elements that give them ability to make up ground when their jumps fail (ex - Chinese (or Savchenko) on throws, twist); and (3) slightly better and more imaginative choreography. I sometimes think the latter is simplified for US teams so they can complete elements, and I admit there are exceptions - The Lion King for D/F, that LP for C/L last season. But, for example I watched K/O skate to POTO in 2016 and everyone was so excited, but I knew looking ahead it wouldn't fly as high on the international stage. It was a warhorse and their elements are relatively small (I was personally excited by that initial move to Dalilah because I thought she would give them more power on big elements, alas) I also remember Zhang / Bartholomay in 2014 who never missed an element being placed on the Olympic team, but you needed a microscope to see their elements.
One US team that totally excites me is C/J because I see their SS are IMO a notch above the other top US teams and that will give them an edge if they make mistakes. I believe a relatively clean SK/F beat them at SA, but C/J weren't behind by much even with jump mistakes; They generate great power from a few strokes. They have interesting transitions and choreography (OK - the SP only), and their posture and stroking is something I would expect from a Euro or top Canadian team. The throws and twists are big, but let's circle back to the topic - SBS jumps. I am in descending into despair because it looks like the jumps might become 'a thing'. I truly hope not: A clean season post-pandemic season IMO would elevate C/J more than any other US pair (IMO) towards medal-land