ravejk
Eric Ries has some really interesting thoughts on this topic. Check out this blog post: http://www.startuplessonslearned.com/2008/11/what-is-custome...
The look described here sounds simple, but super casual and perhaps a bit dumpy for a designer. I find that the easiest thing for me is to wear all black clothing that fits well (don't buy it unless you feel great in that shape and material, no compromises). Avoid cotton because it fades and has a gross texture. Done.
This is more than just UX - you're talking about product design, usability testing, reviewing quantitative data, then reworking features & design (UX/UI + dev) - the whole thing.
Sounds like you're saying that the UX principle of, "being really persistent in iterating and discovering what works" is essential to product - yea, agreed - that's called working towards product market fit. That kind of analysis and iteration is definitely good but not a novel idea.
Also, a suggested revision to title: "Don't look for a UX person, be a UX person." There are women on here too, thanks.