Because, as you've perfectly demonstrated in your post, what I would want in my knife is different than what you would want in yours and that's different than what others would want in theirs. And after they get done trying to be everything to everyone, we end up with a knife like this...
View attachment 22551
And it costs $10,000. And they can't maintain it.
Actually, it's under $1,400...
Wenger 16999 Swiss Army Knife Giant - Most Expensive Item On Amazon - Amazon.com