As far as I can follow your argument, it seems to be that the native tools perform better on the small inputs (that only ever take a second or three to complete

As far as I can follow your argument, it seems to be that the native tools perform better on the small inputs (that only ever take a second or three to complete), and that the creators ("maintainers"?) of Sucrase have their thumb on the scale or something, since they emphasize in their results the very large inputs that will involve longer running jobs where their tool has had a chance to warm up. In other words, the tools you're defending only do better when it doesn't really matter, and the tool you're downplaying outperforms the competition on the jobs where it actually does matter. If anything is backwards (or "stupid", as you put it) then that seems to be it. Maybe I'm misunderstanding. In that case, please provide a better benchmark.