Of course if put a lot of work on performance of and engine and you compare using webgl you won't see much difference, but some of us still have to support IE users while meeting the deadlines.
I use both direct JS and Haxe, both have their specific uses, at least I we don't have to use Objective C in both cases. My favorite use of haxe is more about application structure than "implementation". Benefits are way more obvious when there is a lot of pieces in your puzzle, just think of it as an alternative to GWT. If you have to do a desert rally: using a motocross might be faster, but using a 4x4 could be a way more enjoyable experience. Not much web programmers experienced coding comfort and IDE debugging.