When FJ's blueprints were released it was exciting and fascinating. I still have my originals. Yet it didn't take long to realize bit by bit that what he had drawn was not the ship I had seen onscreen despite it being advertised as such. Yeah, where was the Emergency Manual Monitor and Auxiliary Control for example?
But the style and professionalism of his work was inspiring and set a lot of fans on a path of emulating him and building on what he did. A lot of 3D modelling in Trek today can trace its roots right back to FJ's Booklet of General Plans
and Star Fleet Technical Manual.
It wasn't FJ's accuracy or authenticity that was inspirational. It was the style and professionalism applied to a subject matter often dismissed as not worth the effort.