Not all of them, no.
There does need to be a merge/dupe-fest but the thing you're painting as harmful, pulling in a quote isn't off-topic. We've been through that at least a dozen times or more. It doesn't "drive away experts". That's ridiculous and I don't think taking it that way (without the context of the big ranty question) represents Jorge very fairly.
Problems that resolve through to real bug reports on launchpad are helpful to everybody. They push people to the right place, they give us something to close-dupe against and when needed, they help people fix the problem directly.
That last point is important here because you cannot apt upgrade to fix this bug.
This bug breaks Apt. It locks it.
That's why the hairy wget/dpkg workaround exists.
That's why it needs at least a question and answer on this.
Regarding the "duplication of effort", what we currently aim to do provides the least amount of duplication for popular issues like this.
I'm talking about one good version of the question and an answer that fixes the problem that links back to the bug.
It gives us something to quickly close the duplicates against.
Deleting them all doesn't. We're still going to get people asking.
Having questions here gives people something to find when they Google the problem. Multiple descriptions of the same thing, all pointing towards the same answer and link to Launchpad.
Closing/Deleting them all leaves the Internet with one bug report. That's much harder to find unless you're searching for the same words and that means more bug reports, more questions asked here to nuke.
And that's well before you try to draw out the line between bugs and problems that happen to be bugs. It's impossible to pick a line that wouldn't —if applied globally— lobotomise Stack Exchange.