How might a user fix a Recipe that is missing nodes?

It can't be deleted in the Recipe Manager

It can't be added to the scene to replace/fix the issues

Is it just meant as a constant reminder to be better at life?

Edit the contents of your recipe in the Recipe Manager, remove or add new nodes in the network, then select all nodes and click the "Reload Selection" icon in the top right corner of the recipe settings pop-up window.

The whole right click menu is greyed out for any Recipes missing nodes. I can only edit working Recipes