It should be understood that high leverage is beneficial only to the exchange, since its use by a trader increases the volume in the deal, which entails increased commissions for the exchange when opening and closing a deal by a trader. In case of order liquidation, which is almost 100% with increased volatility, the exchange also receives an increased percentage for closing a position.
As far as I know, it's just about the fee for them, so it doesn't matter if you win or lose, they get their fee one way or another. If you do 500x and win big amounts of money, they still take their fee, they do not need you to lose, that doesn't matter to them. Because while you may do this, there is someone on the opposite side doing the same thing.
Think of it like sports betting, they give you a chance for team A to win or Team B to win, people bet on both sides, and no matter who wins, the bookie wins. Same for exchanges, if they give you an option, doesn't mean that you are trading against them, they are not putting up the money for you to win or lose, if you win they are not the ones who are paying up.