I don't think he gets lack of respect. Directors have studied his stuff for years. Anyone who has watched his movies has been impressed for years. However, let's face it, the average person didn't have any inkling who he was until Rush Hour.

As for Jackie Chan's work, the problem is that you get injured. No stuntmen in their right mind would do the kind of stunts he did. A slight change to the angle of several of his bad landings and Jackie Chan isn't a star but has been dead or crippled for 20 years.

As for his fight choreography, the primary problem is that it takes time, and that's something that Hollywood simply will not abide. You see this in the way Hollywood does music, CGI, etc. Everything is about cranking the handle and getting things done quickly, if there is craft, well, that's a happy accident but certainly not required.