No, it's not ridiculous, it's sane. The whole point of a SPA is to give a user a better experience. If on average this does not materialize in the real world,

No, it's not ridiculous, it's sane. The whole point of a SPA is to give a user a better experience. If on average this does not materialize in the real world, and often achieves the exact opposite, the entire concept fails. Bad SPA implementations are the standard. Saying that it's possible to make a good SPA implementation doesn't change the real world outcome that most often, they don't deliver.