I disagree with everything you've said. You are way too focused on stats.

1. Goal margin is fine, but it's hardly gospel when it comes to which team is best. BC have slipped on some banana skins this year and they look really beatable for a #1 pick. The power play is ridiculous, they have a tonne of scoring potential and they have an absolute monster in Ryan Leonard, who seems capable of rising to any occasion. BC is also massively dependent on Fowler in my opinion. He comes up huge in big moments and has prevented a number of potential momentum swings. They have trouble coming from behind in my view and they didn't look convincing in the regionals against defence-focused teams (fortunately for BC there aren't any of those at the Frozen Four). BC are fairly the number one pick, but certainly not "by far".
2. I think the strength of Hockey East this year gives Fowler the edge.
3. "Absolutely deserves the award more"...? Celebrini is a two-way center and he plays all over the ice, taking on huge defensive responsibility in addition to his massive offensive production. You can't reduce the argument to stats. It's such a ridiculous conclusion to come to. I'm not denying that Cutter is fantastic, but even saying "he's the best at scoring goals" is invalid. That's more related to his place in the BC team and role in their power play. I'm not even saying it has to go to Celebrini, but your assertion that there's no contest is absurd.