>>41137656And defog basically does nothing if neither player (or only you) have entry hazards up. Like, what's your fucking point. You're not going intentionally throw the game by picking a literally useless option. So making up this excuse that the swap does nothing if both players have sneaky pebbles accomplishes literally nothing.
Furthermore, even in the most competitive teams, there's going to be situations where one or more of the 4 moves on pokemon from your team didn't get an opportunity to be used, etc. Ex: you got a Ferrothorn with Power Whip, but they don't have any pokemon weak to grass on their team, and setting spikes or using knock off with ferrothorn gave you more advantage than hitting neutrally/less effectively with Power Whip. Oh no! Power whip was useless guys! Sometimes people play pokemon that aren't weak to grass. It's a shit move because you intentionally didn't choose it in this one situational battle, even though it's statistically more likely to be useful than other moves that could've gone in that slot!
What the Cinderace unique move grants is a large shift in momentum. You can potentially, in one turn, shift 3 (or even more) turns worth of entry hazards onto the opponent, in one turn, and potentially make them waste yet another 2 turns switching in (1 turn) and then clearing the field (2nd turn) with a rapid spinner/defogger for hazards they had set themselves, meanwhile you were slamming them with damage those two turns they're trying to cope from the shift in advantage, where yet again, you're just gaining advantage.
Like, consider a game like Yugioh or whatever. Change of Heart is forbidden. All it does is take an opponent's monster until the end of the turn. They go -1, you go +1, and that's enough of a shift in advantage to get it forbidden. I'd imagine removing 1 entry hazards and gaining 1 entry hazards on your opponent would already be good enough for advantage, but it works for any number of entry hazards.