I don’t play enough hockey to understand how a LW can’t learn to play RW
Laf will get better but he’s blocked at LW. It’s so weird that getting 2nd or 3rd pick would of been best to draft Stutzle since he’s a C
Also getting 1st Hughes over Kakko
For offensive players, the biggest difference is due to handiness. A lefthanded shot on LW controls the puck naturally on the boards side of the ice. It's easier for them to protect the puck while carrying and passing, as the puck is naturally to the outside of the defender. If they are stickhandling, they can generally pass, shoot, or dip the shoulder from the same basic position.
For playing on the off-wing (so lefthanded shot on RW), the player now naturally controls the puck towards the middle of the ice where the defender is closer. Thus mitigating an opponent's attempt to maintain good gap control becomes incredibly important if you want to handle the puck on the forehand. The advantage is that if a player learns to do this, they have way more options as a LH shot on RW than they would on the LW. They will have a better angle on the goalie for a shot, they will have better peripheral vision for passing because they are facing the play on their forehand, they can build more deception into their game, and if they're the pass recipient they have a ton of flexibility for shooting off the pass they don't off the LW (slap shot, snap shot, sweep shot all viable vs. snap only as LH on LW).
The part that's tough for LH shots on RW is that if you try to play the game the same as you did on LW, that will result in carrying the puck on the backhand much more often. All passes would have to be made from the backhand which is naturally weaker and less accurate. Dipping the shoulder and carrying the puck results in doing so on the backhand, or with one hand on the stick like Gauthier does, which makes it harder to get a quality shot off even if the drive is successful (and requires a TON of lower and upper body strength against NHL defensemen).
The best way for a LH shot on RW to counter an opponent's ability to close you off or direct you away from the play/towards the boards and backhand is quick power turns, and power skating moves that make you a threat to change direction towards the middle of the ice suddenly so that defensemen have to back off. If D close on you to force you backhand/boards, and you quickly cut to the middle, embarrass them, and score, D are going to give you more room because of that threat, which is going to give them time and space to react if you try and change direction suddenly, but that is also going to give you time and space to handle the puck on your forehand since they are not within pokecheck range anymore.
Lafreniere, at present, lacks the skating ability to do those things, so D know if they close on him, they're not going to get burned. Look at how D play Laf when he's on the right side of the ice vs. how they play Kucherov.
Playing offwing is not at all easy to learn, but if it's mastered, it opens up a lot more possibilities.