And you think he did that on his own? Oh please, if he did he could do the same on any line he was added to.
Of course he can't, but like was posted already by other people, his 5v5 stats after two seasons of hockey were excellent, best of team in some of the "one stat to rule them all" ratings and really high league wide, tied with Scheifele for best 5v5 goal differential, most goals, most 5v5 goals, 3rd points and all the while he was still playing with Little 50% of the time. To me, that has earned him the top-line spot. If Stastny was still in the team, then Laine in the 2nd line could be easy to justify for creating scoring depth and incredibly strong 2nd line, but with the 3 season history of Little+Laine combination, it should be clear that is not a combination that supplements each other.
Most of Laine's good 5v5 stats came from his stint with Scheifele as a rookie and then with Stastny in his 2nd year. They were still playing 2nd line minutes with Stastny, the difference being they actually meshed as players since Stastny is a playmaker. Do you really think Scheifele or Stastny can lift just about anyone to score 40-50 goals & allow a lot less in their own end while doing it? In that case the Jets should have never left Stastny go, but trade Laine instead and now reap the benefit with Ehlers or Vesalainen or someone potting 40 in the 2nd line.
I'm not saying he did it all by himself, quite clearly he did not and that's a bit ridiculous ask.