That depends on how well vented they are. Most people undersize their range hoods for aesthetics and don’t take venting seriously. Of course recent findings show it’s a bad idea to cut corners on that with gas stoves, and ovens to some extent. But it’s mostly stoves that have the issue you describe.
While they are less of a problem when they’re better vented, they’re still a really big problem. You can’t possibly vent them well enough.
Still sounds like you’re talking about stoves. To use a stove, you inherently need to stand next to it and your face is between the flame and the vent. Ovens are well insulated (this is important for energy efficiency), they vent to the outside, and you are not generally standing over the oven throughout the baking.
Where do you think the oven vents its exhaust gases to? The outside? So you have an exhaust vent directly attached to the oven? Which model of stove does this? Most of them vent into the range hood like the stovetop, or just into the room.
Let’s give a better example…. A well vented stovetop…… and you burn something on it really badly….
Does the vent catch ALL the burning smell? Or does the kitchen still smell of burnt food?
Yeah, that smell is the gases and particles that the venting didn’t catch…… there’s still a fair bit, isn’t there…… can you smell the burning?
The amount of gas that’s healthy for you to consume is basically zero, so even if the range hood catches 90% (I think it’s closer to 60, but I don’t have a source on that), there’s still a lot in the air.
K, so put the condescension away when you can do these experiments at home with the help of a responsible adult.