Man I'd be sweating like a pig if I was direct-applying epoxy to a prototype so close to done. I'm used to code where trial and error is de rigueur, I forget sometimes you only get one chance.
...They also don't call them test pilots for nothing...
I don’t know how well versed these pilots are in manufacturing this kind of stuff, but I would guess that’s mostly psychological. But yes, it’s their lives that are on the line. If this wing we’re to break or fall apart at supersonic speed, I guess they (or one of them, if this is a single-seater) are dead.
Being a professional woodworker is not really a viable career option (unless you get lucky). Building kitchens, doing finish carpentry and other related fields of course are, but woodworking is only a relatively small part of that. Very few people can afford the amount of labour that goes into bespoke furniture items.