"...cos if Nelson hadn't staved off
mutinies in '97 there would've never been a Trafalgar, I suspect..."

But Nelson had nthing to do with either the Spithead or the Nore mutinies - He was in the Med at the time.
Oh yes, and the mutineers had declared that if the French were sighted, they would sail and fight. The mutinies were more in the nature of a strike ove pay and conditions than a full blown mutiny.