Which is a breach of the EMH, and evidence the whole process fails

No it isn't, because,

If goods are not traded somewhere near “real value”, then supply and demand go from being the effective tool capitalists claim to being downright wasteful at best, and Police-Theft at worst.

This just shows your misunderstanding of the concept of value.

A well-governed economy is one where the unions sit back and go “well shit, we got nothing to ask for because we already have it, and if we ask for more it’ll bankrupt the employer”

Here we largely agree. Unions are kind of like the LGBTQ or deaf communities, in that ideally they would have no reason to exist.

As a side note you may want to consider that fishermen are paid well because it's not a job many people want to do or can do (as it is often dangerous and always tied to a specific locality) and thus competition for the role is not as broad, meaning wages go up exponentially. Same reason linemen, which is also about the same skill level, make so much money.