One thing about woodworking is that parts of it are easier for someone who has had a career in thinking logically and several steps ahead. If you also have had experience laying out user interfaces, that can help too. However there is the flip side, in that a number of techniques in woodworking aren't easily discoverable unless you've been working in the field for a while, and it is all too easy to get hurt (even when not using power equipment). I personally love doing projects, but on every single one I end up getting some sort of injury (typically something small like a splinter under the fingernail, or a tool slipping causing an abrasion on my hand, but annoying none the less).

But you are right, in that there can be a good bit of coin to be had with furniture building, especially if you can draw on some standardized design principles to output good customized pieces. Think things like a closet organizer that is "perfect" for a customer's bedroom. Or things like cranking out desks needed by students doing school from home.

In fact, I probably could have made a killing in selling "pandemic" desks (there were absolutely no desks to be found at the beginning of the school year). I made a couple for family members, made out of real hard wood (no partical board) for about $130 in lumber and connecting hardware -- nice 3-drawer desk units. I basically used rail-and-stile frames to make the back, sides, and drawer box using pocket screws, then 1/4 inch plywood tacked from the inside of the drawer box. Took about 3 hours to cut, drill, and assemble everything but the drawers themselves. If I was out of work I probably would have made a bunch and sold them for $350 a piece.