That's not obvious at all. Nor is it correct. Have you seen the size of these thermocouple wires? They're tiny-- on the order of 14 gauge wire. I don't know of a single oven door on the planet with such a tight closing tolerance that it can't accommodate one of these wires.
Yes, I did look at your original link. Thank you for that.
Both of my multimeters have 14 gauge probe wires. I tried to close them in the door from various angles and it would not close no matter where I positioned the wire or how hard I pushed on the door. Perhaps with some real brute force I could close the door, but I'm not interested in finding out the hard way that I have damaged the door and caused leakage of microwave RF during operation.
I'll look for a thermocouple with perhaps 22 gauge wires. Although my issue with the convection function of this oven has been solved with the repair of the damper. I've cooked several different meals in it since my repair and all are cooking exactly as expected in exactly the amount of time expected.
I'm just a guy with a technical background who likes to fix his own stuff, not a seasoned repair tech. I have not compared the specs, fit or finish of hundreds or even two microwave ovens, but I would think that like mine, they should all have a tight tolerance where the door closes in order to complete what is essentially a faraday cage, preventing the leaking of the microwave radio frequencies from the oven cavity.