S&B waste water system has roof top open vents
If sewer system the whole dang neighborhood is connected...that's a whole lotta sewage and yet no odors
If septic system then all house vents are directly connected and septic tank has 1500 gallons of waste in it
And nobody uses any chemicals down there toilets due to stink
completely different situation not even vaguely a good comparison compared to a chit tank in a rv that u literally sit over
and yes millions of people use septonic (odour and solid reducing chemical in their septic system