Stove on a sailboat? huh...
RE sharp corner and edges I'm sort of a let the kid burn his hand on a stove if they insist on ignoring your warning sort of parent, however my wife is a 'you can't use a knife until you are 18 and you must wear a helmet while playing on the playground' sort of person. I'm cool with it, takes both a hug and and push to raise a child IMHO.
He's gonna definitely be more careful about what he grabs on the boat now, which is a good thing. I've been teaching him the one hand for the boat thing and also to not grab anything that moves, which takes a bit of learning on a sailboat evidently.
But hey, sharp edges are a bad idea in general so they gotta go. I hate cut hands.