Why isn't mustard considered a "proper" salad dressing?

[Penis Drager]

I just put a light drizzle of mustard on my salad and it was among the best salads I've ever had.

 

[Quantum Diabetes]

If it’s tangy

 

[BlueArmedDevil]

Dijon mustard is a key component of a few salad dressings

 

[User names must be unique]

Why isn't peanut butter considered a salad dressing?

 

[DerKryptid]

Why isn't ketchup considered a salad dressing?

 

[Coolio55]

Nigga mustard is a key component in french dressing what are you talking about?

 

[Lathe]

Why isn’t butter and sgetti considered fine dining?

 

[Cloaca Rimjob]

Nigga mustard is a key component in french dressing what are you talking about?

Don't think I'd enjoy the taste of nigga mustard