All very good points, and no offense taken. You may well be correct about adhesives being as strong or stronger than metal screws or wires. In Mirai’s case the argument may be that a screw insertion into drilled holes gives additional strength to resist shear force. I suspect it also depends upon the degree to which the adhesive penetrates the ceramic. A ceramic is different from a car part in that it is inherently weaker (it coheres to itself less strongly) and reacts to shocks differently (metal is rigid without being brittle; clay ceramic the opposite). It’s difficult for me to believe that without bracing that broken ceramic surfaces epoxied together could be as strong as unbroken ceramic, but perhaps I don’t understand modern adhesives.
In my case, I did initially question the creation of a groove as weakening the pot, but in the end was concerned that the finished ceramic on the bottom of the pot, while not glazed like the sides, might not provide an appropriate surface for the epoxy to adhere to, whereas the groove exposed the interior of the ceramic and added surface area. But these are gut feelings not bolstered by experience. Thinking about it now, perhaps using a 1/16" steel plate epoxied to the bottom of the pot might have worked better, but in that case I worry about the different expansion coefficients of the steel and ceramic creating a situation that would put stress onto the adhering surface.
All food for thought! Do you have a suggested adhesive different from the Oatey Fix-It Stick?