They said this in Laine's rookie season, and he went on to have even higher Sh% in his sophomore season.
He went from 17.6% -> 18.3%, both rates which are all still less than Pettersson/Drai/Point this year. Then consider that Laine went to 12.2% this year.
Since 2005/2006, highest shooting %'s, and scoring 40 goals in a season - Followed by their next best shooting %
Karlsson - 23.4% (14.2% 2nd best)
Draisaitl - 21.6% (16.9% 2nd best)
Point - 21.5% (14.8% 2nd best)
Boyes - 20.8% (15% 2nd best)
Stamkos - 19.8% (His 60 goal year)
Lee - 19.2% (17.8% 2nd best)
Stamkos - 19.2%
Vanek - 18.9% (18.1% 2nd best)
Selanne - 18.7% (15.6% 2nd best)
It is literally unheard of in this era of hockey, for a player to score a lot of goals and shoot at above 20%, and the one guy who was close (Stamkos), had the 2nd best goalscoring year in that time-frame, but still only has a
career sh% of 16.9%.
Long story short, anyone who thinks their favorite player will continue to shoot north of 18% is out to lunch