Why can't Yoda use proper grammar?

[Acsenray]

And what’s that?

[Clothahump]

@Giles

Worse would be Obi-Wan Kenobi: “This is not the road you are looking for.”

Or when you miss a turn and Vader says: “I find your lack of faith…disturbing.”

[Snowboarder_Bo]

Shouldn’t this thread’s title have been “Why can’t Yoda proper grammar use?” ?