No Fun League (NFL) going too far with celebration restrictions

Now I know this is a bit of a stretch but according to the rule it is legit, the rule says that if a player goes to the ground while celebrating it is a penalty. The problem with this is that it is not consistently enforced and honestly don't make much sense. When a players makes a play and goes down on one knee to thank God is that a penalty? Technically yes, but it's not called. But if a team organizes a high five in the endzone? bang, 15 yards. What's the matter with a player dropping to the ground, when it's perfectly fine for them to jump into the stands or dougie in the endzone. I'm not a fan of restricting celebrations in the first place, but if it is going to be done at least make it reasonable.