@Quadsword Yes but did you read what he said!? "incendiary grenades would be exempt"... The change suggested only affects one team really, unlike in CS:GO which IT DOES BOTH. If it's not both, then no. I've played CS:GO, I've put out fires with smoke too.
The maps were designed around this mechanic being a thing while these game hasn't taken the possibility into account and for it to be implemented now wouldn't do anything other than nerf the already less advantageous attacking side. You may have noticed on some maps that there are burning barrels, usually in darker areas and the surrounding position would be good to defend from but you're lit up from the nearby light source. Now imagine being on the defending side, close to one of these barrels but you extinguish the fire/light source and now you're very hard to see.
Smoke is way too easily spam-able. Imagine calling in smoke mortars on the objective, and boom, instantly negated the use of Molotovs for a minute plus. So erm, once again, this ain't no simulation. My suggestion to you is go play CS:GO if you want to shoot and put out fires with smoke.