This is completely ignorant. Their is a reason the swim happens first. Even for elite athletes the swim can be dangerous. If you get tired running, you just

This is completely ignorant. Their is a reason the swim happens first. Even for elite athletes the swim can be dangerous. If you get tired running, you just walk, or stop. If you get tired swimming you drown and die. The risk factors for open water swimming are dramatically different from other sports. Many races get cancelled just based on water conditions.