Question about braces

[Arnold Schnitzer]

Two prominent makers I know of do the following with their flatbacks: Cut a narrow groove across the back where the bend will be; install a cross brace just at the lower edge of this groove (across the back); bend the back crease, using the cross brace as a kind of fulcrum; glue the upper part of the back to the rest of the already-assembled corpus. No reinforcement whatsoever of the bend. I'm wondering what you guys think of that method.