"Imagine a strongman trying to move a rock. Indeed, this strongman has immense strength, but his speed in moving a one-kilogram dumbbell compared to a hundred-ton boulder can't be the same, and the energy expended is different as well,"
This is completely different from Amberser's destiny weaving.
Destiny weaving is like pushing dominoes; even if the last domino weighs a thousand tons and the first one only a hundred grams, as long as the process is sufficiently lengthy, the initial effort Amberser uses is the same.
Weaving the fate of stumbling while walking compared to death, for Amberser, requires the same energy expenditure. The only difference is the time it takes to take effect. The former occurs immediately; the latter needs to brew, perhaps for a year, a decade, or even a century, depending on the individual targeted.
The power of the Time Dragon is instantaneous, so you must use the corresponding energy immediately, or else there won't be any effect.