Dubious. In Iceland my Canon 1dsMk3 with 24-105 L lens slipped out of my hands and fell lens-face down on a solid, pointy, sharp-edged shard of ice on the "beach". It made quite a loud thud and I thought I was done for. Turned out the filter wasn't even dented and the mechanics of both the lens and the camera survived just fine. Well-built equipment can take a lot of punishment. In a suitcase one can wrap a camera and lens in enough clothing so that such damage just wouldn't happen, even if they threw the suitcase in and out of the hold, as they so often do.