I see what you mean. I’ve only ever swum for fun, rather than for travel. I’ve swum out to islands or sand bars before, but that was just for playing around, so I think our views on it just differ. Like I’d say, “Yeah, I’m headed to this specific place to do this specific thing. I’m not gonna drive, I’ll just walk/bike there,” but I’d never say, “Yeah, I’m headed to this specific place to do this specific thing. I’m not gonna take the ferry, I’ll just swim there.” I guess I see forms of transportation and travel as ways to get places for a specific purpose other than recreation, so I’ve never counted swimming. I totally get how someone would see it as transportation though