Rafts are not though, and ocean crossing with a boat/raft covers more distance than simply walking or either running as surface isn't flat unlike the ocean where you only have to go forward without any obstruction. not to mention it literally is the best way to travel since it doesn't cost satiety and you are defended from mobs... imo sailing is great if you need for ex. a specific rock strata, it covers a rock layer waaay faster than going on foot around it. A mountain also gives way more readily accesible land as opposed to like the biomes where it's really fucking hard and annoying to even get through 200-300 blocks. not to mention mountains. imo having oceans near your base or spawn is a pro not a con... except if you start like on a small ass island without any resources. but then again, chop down like 2 trees and get vines from it or just cattails to rope and build a raft and an oar.