A long but useful essay from Megan McArdle.

We have a similar issue in the space industry. I see all the hype about the upcoming Orion flight, and as an industry analyst (though not quite an insider) I know that it’s nonsense, but it’s hard to get people to realize that NASA officials are often forced to dish nonsense to placate rent-seeking congresspeople; as outsiders, they are still in awe of the government agency that put men on the moon four-and-a-half decades ago.

There is also this:

…when I see journalists saying that Gruber’s revelations don’t matter because he’s just kind of awkwardly saying something that everyone knew, I get a little jittery. I am not “everyone,” and neither are any of those journalists. We’re a tiny group of people with strange preoccupations who get paid to spend our time understanding and explaining this stuff. The fact that we may have mentioned it once to our readers, in the 18th paragraph, does not mean that readers read it and understood what it meant. (In fact, if you actually interact with your readers, you’ll be astonished at how little they remember of what you told them, especially if you didn’t go out of your way to headline it. Their minds are already crammed full of information that they need to, you know, live their lives. So they tend to take away a few big bullet points, not the piddling details.)

I see the same thing when I argue with people on Twitter, or in comments — we often go around in circles because they seem to have forgotten some previous point I’d already made, or read what they wanted to read instead of what I actually wrote. The dismaying thing is that these are often people who love space, but they end up being cheerleaders for things (like SLS/Orion) that are roadblocks rather than enablers.