Shitty First Drafts

I don't think the shitty first draft process will work for me. By nature I am not a very organized writer so for years I have been training myself to create detailed outlines before I start writing to keep me on track and ensure I prove a point through my writing. This time, without an outline to go off, I found myself lost and rambling. Some people said that they felt more productive because they didn't have the block of trying to make their sentences perfect the first time. I find that I don't encounter this block because when I write the outline I don't use complete sentences, but by the time I go to write a real draft all I have to do is formulate a good sentence that expresses the bulleted point in my outline. Granted their are points in my shitty first draft that I want to use, but I feel that I have to sift though piles of junk to find just a few good points, which need to be further uncovered from the confusing sentence in which they are embedded. In my next piece of writing I might incorporate the shitty first draft process into my outline by writing an introductory and concluding paragraph, but leaving the rest as bullets.