That would lead to a whole bunch of false positives when people are cooking. Which is an issue too.
Anecdotal: a friend had these in apartment and they ended up covering them with sacs everytime they wanted to bake meat. Cause otherwise the whole building risked evacuation just because they wanted damm baked chicken or something.
Steam from showers sets off some types of smoke detectors as well. I know of a student halls of residence that had them. In the uk that type of building is classified as high risk so the alarm system is directly connected to the fire brigade. Cue grumpy firemen making students stand out in the rain at 1 in the morning every couple of days while they search the building for a non existent fire.
Anecdotal: a friend had these in apartment and they ended up covering them with sacs everytime they wanted to bake meat. Cause otherwise the whole building risked evacuation just because they wanted damm baked chicken or something.