RW training/flying is harder. Anyone who can do RW can likely succeed in FW, more so than vice versa.

But it's also different. RW people need enough FW experience so that some things become second nature (speed and landings for example). If you try to rush it, it doesn't go well, as some regionals have discovered. Just because it's legal, doesn't mean it's smart.

The average green beret is far and away better at hands-on operations in dynamic situations than average slacker RJ FO. But that doesn't a SOF operator has any business landing a jet... unless he gets trained to do so.