I think a lot of people don't believe it because they never in all the news coverage talk about how it's done. For example the temperatures are such that the space suit would have to keep you comfortable if you were submerged in boiling water. Or why does the capsule re-enter heat shield first instead of spinning like a rock. And so on. So it's the fault of the media. I like to read personal accounts of astronauts, like one of them spent the whole time fixated on what would happen to him if the window blew out... And a lot of them will say things like oh, you're too busy to think about that, when you ask about things like philosophical effects. But could anyone really avoid that? Kind of strange, really. Strange effects maybe.