“You’re okay with a Jew every now and then getting a little treif flavor?”
As previously discussed, there’s straight up Halacha that says burnt substances of any food are no longer considered food. When we’re talking about an oven, that’s the “flavor” you would be getting. And as mentioned previously, even many sfardi poskim say that even gelatin in foods isn’t an issue for this exact reason: it’s simply no longer food, as it’s been broken down so much.