Your subfloor appears to be sound.
Like you, I'd always go for a wood floor.
It's impossible not to track mud and wet into the boat, and our first boat had carpet tiles, with a big stack of replacement tiles.
Never liked them, and we replaced with karndean planking over a ply base - looked like a boat, and could be mopped. Once down, you'd be hard pressed to tell it wasn't a lovely oak planked floor. It was faultless for 10 years, could be mopped, very hardwearing, and looked lovely.
Yes, it was cold. We wore thick socks, and in the summer the dog loved cooling off on it.
I'd have liked proper wood, engineered or other, but you do have to be confident of dry conditions. Wet or damp will destroy that lovely wood flooring, staining it in an instant, and then warping etc. You must be completely confident of having a dry, reliably dry, subfloor.
We did have a problem in the bathroom, and all that was needed was chopping out some subfloor, and replacing the karndean - easy job. I suspect not so with a solid glued wood floor.
It only takes a couple of hours of an open hatch dripping to ruin an engineered floor. An ongoing damp bilge might take longer, but in the end it's going to grow mushrooms.
You do have an obvious issue of wet related rot by the door. That is a huge warning indicator.
I am not connected to Karndean - just think it's an ideal boat flooring solution.