How have these stats been complied? I suspect they have simply given the ratio of goals to shots taken. Don't think that is a fair representation of someone's finishing.
Yeah, but that also works against Rashford too, you can't ask him to be a 30% finisher without having into account how many of his chances come from second plays, crosses, how many of them he earns or even creates, etc.
The Cristiano stat is so bad because he took a lot of shots outside the area (and even long distance) that gave him some goals by destroying his conversion rate, still, sometimes he's not a clinical finisher, like every player he has his share of missing sitters, but the volume of chances teams like Barcelona or Real Madrid create for their forwards usually ends up racking goals.
I like to see Rashford more in the spectrum of Cavani, Cavani is an awful finisher, far from clinical, but he earns and creates so many chances that at the end of the season he's still up there with the most clinical players, in that regard having Lukaku opens a paradox for Rashford, his raw output (chances created, key passes, and assists) might go up, but having a teammate scoring from fewer chances makes him look worse for people that don't look at the bigger picture, in the end it doesn't matter if you convert 50% of your chances creating 4 for game, or score 25% creating 8, the problem with guys like Rashford or Cavani is that people focus too much on the chances they miss because TV can dwell on that replay 5 times in a game, if you don't get into scoring spots often and just suck as much as the other 10 players of the team you haven't done better, but somehow people will ignore it because you're not in the spotlight thanks to making a great play and reaching a spot that no other player would reach to end up missing the goal.
Thing is, guys like Rashford are not easy to come by, the Messi vs Ronaldo era has biased people opinion into believing 15 goals per season isn't enough to be a top player,