Kruijswijk finished 124th in stage 1 of this year's Tour. Doesn't say anything, it's just a dom taking it easy. Tony Martin finished 81st in the first ITT in last year's Tour.
Following that logic, any miraculous transformation becomes justifiable.
Within context, Vingegaard was never viewed as a future GT winner in November 2020. The only ones who imagined such a scenario would be Jumbo's staff themselves based on the data they had.
But let's not rewrite history or find excuses, i.e. this is a Froome level type transformation from nothing to legendary climber & ITT specialist. You can always dig into a rider's past & find xyz stage or result which might hint at some star potential, but as a whole, Vingegaard's youth results & performances until early 2021 do not paint the picture of a Tour de France winner less than 2 years later.