I have no axe to grind either way, suffice to say that the RCD (despite your wishing that it didn't) DOES apply to all recreational watercraft. be they on rivers, ponds, canals or the sea.
Within the last few months there have been 3 examples of different posters on this forum being told by brokers that they are unable to sell their boats for them without the correct RCD / RCR paperwork.
Each time I comment on the RCD I say that the choice is down to the boater involved, but, they should only make the decision based on knowledge of the facts and not the opinion of those who are ignorant & who say 'don't worry about it, they'll never catch you'.
With regard to Colecraft and others, just because they are 'big companies' producing 100s of boats a year does not make them infallible.
I'll write it in simple bullet points so you can follow the argument :
1) They claim their boats are manufactured in accordance with the RCD / RCR
2) The RCD / RCR states that the guidelines of ISO 10087 must be applied.
3) ISO 10087 details the format that the WIN must follow
4) Does the Colecraft WIN format comply with the required format ?
5) If it does not then Colecraft cannot sign the Certificate of Compliance, or, if they do it is fraudulent.