Re: Why would tracker do this?
Maybe my computer is messing up but that's not composite material unless wet, rotting wood counts. Having voids between pieces of wood is a big difference structurally then one or in this case three solid pieces. Although you are right that most of the load is carried by the fiberglass, the wood does act as reinforcement and you're only as strong as the weakest link.
That is what I call being cheap by Tracker.
The image in the original post is in no way indicative of the quality of the product. There is absolutely nothing wrong with the technique and materials pictured in this application. A plywood core may not be a very sexy form of composite construction, but it is composite construction.
The difference between this and using Contourkore, end grain balsa, Kledgecell, Nomex, a solid sheet of ply, etc.. in this particular application for these two panel sections is a few ounces of weight. Nothing more. Now, if we're talking about the core choice and construction of the entire boat that is a different story. Triple the cost of that boat new and I can give you one that looks just like it only much, much, much lighter and stronger. That is the difference between a production boat and a high end boutique boat. The difference between a 'glass Tracker bass boat and a 'glass Bass Cat is the quality of the bells and whistles attached to the same generic FRP construction.
I'm one of the first guys that will call out shade tree crap handiwork, and there is nothing wrong with the construction method in that picture. I think the reason this looks so strange to so many is because apart from the occasional balsa cored hull, there isn't much exposure to cores and the various building techniques for cored boats on this forum. Anything apart from the generic plywood transom core and wood stringer repair looks exotic here.