Having a warning for that is incredibly important, mostly in cases where people may be allergic or have sensitivity to certain smells. Incense is not something you would expect at a theater performance, so if I went to a showing without that warning, I wouldn't know to take my allergy meds and may have walked out of there with a migraine or needing my inhaler, depending on what kind of incense they used.
Fair, but people have sensitivity and allergy to different things. Adding it to an existing list of potential deal breakers for those who would rather not risk their health is a case of cost/benefit: it costs nothing and benefits many.
If you're allergic or have sensitivity to smells, don't go to the experimental explosive fuck theater.
If you're sensitive enough to incense on stage or in theater that it critically physically disrupts your body, it must be difficult for you to even walk down the street alongside traffic fumes.
That's too bad, and it means you don't get to do literally everything; you are too sensitive for some things like extreme art pieces or hindu religious festivals.
You're sensitive and have limitations. you can't fight fires, and if you are truly critically physiologically sensitive to incense, must carry that responsibility around with you rather than expecting every person who uses incense to issue a public trigger warning.
We should not start ear-tagging domestic pets with informational placards for having dander or stapling trees with signs warning you against eating their leaves.
Don't eat their leaves.
trigger warnings are tolerable in certain settings(academia), and in rarer cases have a valid purpose I can get behind(warning labels, employment contracts), but they can quickly become unnecessarily burdensome, and trigger warnings for incidental appearance of incense in live experimental art shows by radical artists can fuck off.
...You are aware of how both allergies and air quality works, right? Also, most shows even in art houses don't include scent effects of any kind, hence the warning. If it were common, the warning would likely be unnecessary.
But lovely of you to claim I am the oversensitive one, as apparently adding a single word to an already existing warning, one that could literally save someone's life by preventing a physical ailment, is too much for you to handle reading!