Its beneficial in the sense that all such orders where the buyer and the seller are the same persons will get canceled.
Think of it: What purpose does it trade if you’re selling a contract to yourself? Nothing. Add to it, you’ve to bear the cost of execution of such trades - Brokerage, STT, Stamp Charges, Turnover charges etc.
So the Exchange is facilitating avoiding such trades which in turn helps on unnecessary saving trading costs.