I dont think people see Vingegaard as a boring rider, quite the contrary.. often find him entertaining and willing to attack and reach for the gain and go out on a limp.
Though I reckon many see him as an introvert (= boring restricted person), as he doesn't have that flaming gesticulating attitude, that you often see in fx East Europe or Southern Europe where you have your feelings on the sleeve & tends to be very visual in your expressions and will gladly show anger or content by body language
but I reckon some of that is culture and some personality, though many Danes and Scandinavians in general are not that extrovert & flamboyant.
Also recalled that another Dane Christian Eriksen got some heat from Conte, because of that "restricted" attitude in 2020/21 when Eriksen & Inter won Seria A, simply because he didn't have that Italian temper on the pitch..
Maybe its culture, maybe its this Danish-jantelov "law of jante" that some Scandinavians puts value to (- don't front your success, be humble & grateful and don't think your that special) +27s
View: https://youtu.be/FhdcWYmFdX4?t=27