How can anyone agree to what OP is saying. It's silly.

- Standing in a cloud of toxic gas = breathing it in and suffering from it
- Stepping out of the cloud = still taking damage from it's toxic effects, but at least you aren't breathing it in more, causing further damage

- Standing on a hot surface = it ignites your clothes and you're burning, but you're also standing on the hot surface, which is painful as well
- Stepping off of the hot surface = You're still burning, but at least you aren't standing on a hot surface anymore

Seriously, imagine a room filled with gas, when you leave it, you'll still be hurt by the gas, but it wouldn't be as bad as staying inside. Imagine being a piece of food in a frying pan, when you are taken out of the frying pan, you're still hot, but at least you're not being heated up even more by the frying pan.
Why is this not intuitive for you?