The Mechanical Standard:
Our in-game server runs according to the 'Mechanical Standard' rule. This means that we base our roleplay off of the possibilities available to us mechanically (whether or not they can be done in vanilla minecraft). This means that, if you can't do something mechanically, you can't do it in roleplay, while if you can do something mechanically, it can be done in RP. Climbing up waterfalls is thus perfectly alright, while RPing ropes to get over a mechanically impassable wall is not. The following rules outline the exceptions to this standard, collectively creating a rule known as “abuse of mechanics”.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This is why we dont have to emote "Ducking through doorway". Because it would break the rules of the server. ((Hold on batman lemme explain im not totally crazy read through the whole post))
Example. Say the door was a 1 block hole could a dwarf not emote "Ducking through doorway"? While yes its agreeable that they could in realism terms they could easily crawl through said hole. BUT it would give them a unfair advantage just as making orcs emote *Ducking through doorway* would give them an unfair disadvantage even though in reality they would have to duck through the doorway.
Tdlr, Its minecraft not real life
It is also why you may not fly as you can not do it in survival mode
Now please stop trying to argue. Your explanations and arguement is based off of a really a non issue. And while it would be really cool to have that amount of realism its not possible in MC