Registered beta testers and people actually beta testing is another matter entirely - so no, that wasn't a contradictory sentence, but nice to know you got overly defensive and felt you had to quote and argue each and every point when you could have just as easily summed it up.
How many of those 9,700+ beta posts are duplicates of the same problem/bug being found by the majority because it is staring them right in the face? Most of them.
What Frontier are lacking is a wider audience and fresh testers with different computer builds hitting the mix; and people with experience at beta testing games (or are serious in doing so), not people who pay to play bugged content early just for something to do (and not report squat), or people who have access but do nothing with it - as far as they are concerned, they don't care about beta testing despite being registered for it because they signed up for kick-starter, and it just so happened to be part of the offer.
Point is, you must try to break the game to find the bugs - not just jump in, play it a bit, report the blindingly obvious stuff that isn't working, then rub your hands thinking "job done".
Numbers mean very little - it is the quality of the feedback, and you don't get that from casuals, people who have access but know nothing about computers, etc..
Though there are so many long standing known bugs in the game, I am not sure finding more bugs helps if FDev clearly doesn't have the resources to patch them anyway...