It isn't laughable, watch the Australia Open Final with CL, CL had no idea where any of SK's shots were going, the same thing happened with him and Prannoy in Indonesia (Prannoy is also hella deceptive overhead), CL had no idea where anything was going, whether it was backcourt or front court.
Deception for any shot has three sources (It varies by situation how important each factor is, but these are the fundamental pieces)
Same prep for every shot
# of Variations
Agression and approach of the shuttle
LD has the same prep for every shot, but the two players I just mentioned (and various others) have a higher number of variations. However, LD is separated by his agressive approach to the shuttle (In his prime), however, SK and Prannoy has a similar sort of aggressive approach to the shuttle as well, which is why they are so lethal overhead. Look at Gade, he was a pioneer of overhead variation, hella aggressive to the shuttle, and had the same prep for every shot, PG, TH, LCW, LD, were all hella deceptive overhead because of the three aforementioned factors.
Further proof, LCW was never really known for his "Overhead deception" (Gill Clarke mentions it a lot, even as recent as 2017 Worlds in the Leverdez match, you can hear Steen Pedersen mention it in the early part of the first game (start watching from like 3 points in) after Chong Wei fires a FH cross smash) until his prime starting in 2010, why? Because he was way less aggressive before that, so he was losing out on deception because of the approach, but once he started using his speed to attack and have an aggressive approach to the shuttle, behold: Overhead deception galore.
It isn't like LD is using some magic technique, it is just sound fundamental badminton (And believe me man, that in itself is an achievement)