Why not?
As long as the fingers are long enough and the joint stays in a relatively stiff unbending handle section, I see no problems with it. Say, 3" of overlap and some good glue? Maybe an overlay on the front? Maybe leave even extra mass in the handle?
I wouldn't do it with, say, a finger-jointer bit and a router. But, I bet even with a careful hand, a jig, and a tablesaw, you'd be ok.
Although, I do tend to wrap anything I have questions about. You know, say, a little serving of thin polyester stitching cord under the leather grip.........
