It wasn't even weed, which is a safe and well known drug. It was some synthetic crap marketed as weed. That stuff is totally unsafe and not well studied.
I agree with you, but technically what he was using is completely legal, whereas actual weed isn't in many places. The NFL also suspends players for marijuana usage, but not "spice," as they call it.
It's an indictment of our drug laws and the priorities of NFL teams and the league itself, though, as what you said about the relative safety of the two substances is absolutely true. Spice is essentially potpourri sprayed with various chemicals. But that's why Jones faced no real discipline for that transgression.
I'm not saying Belichick is callous, but he certainly doesn't seem to have much regard for the player in these situations. He cares more about how the player's actions impact the team. That's been his operating procedure since he got to NE.
Those four points made a big difference in how the end of the game played out, however. With those four points the Patriots would have been down 38-37 after the Eagles scored their last touchdown and only needed a field goal to win the game. The Eagles line would not have been able to assume that Brady was going to pass the ball and a strip sack would have been a lot less likely. Obviously, the defense bears most of the blame for the loss, but the missed XP and field goal is not a nitpicky gripe.
Sure it is, when your kicker was 92.5% for the season and you've had minimal special teams miscues throughout he season and every other aspect of special teams is solid. They were 2-for-3 on field goals and the snap was bobbled. That's the type of thing that happens sometimes in big games.
As far as game situations and how they would differ based on hypotheticals, that's a futile endeavor, considering we just have no idea what would have happened. You really can't definitively say how things would have changed.
It's nitpicky, in my opinion, because the game wasn't won or lost based on that four points. That much we can definitively say, considering the final margin was eight points. You simply can't assume anything and I don't think those miscues should be mentioned in the same breath as the defensive struggles.
However, we're really getting into a lot of subjective, hypothetical stuff here. You have a right to express your opinion and perhaps you're right. I just prefer to focus on what wasn't a fluke, which is to say the defensive performance.