I'm not disputing that. I've got a computing degree so I can see both sides of it. There is a place for dev and quality assurance testing be it by automated tools or professional testers before code gets anywhere near a technical preview build.
The technical preview opens up a greater number of hardware and software configurations, however I'd wager that 99% of the people in this thread haven't logged anything with Microsoft via the tools included, and if they did have it was lacking essential details. Microsoft will have quite a job on their hands filtering out all the noise before they get to the useful data.