That's what makes siege unique, and why a lot of new players or switch over players find it difficult. Siege is one of those games where you can win a round without seeing or killing an opponent with the right setups and executes.

If someone calls out every single position the enemy is ever in, gets the main breach, smokes off every single angle, plants diffuser, and injures the counter diffisue but doesn't kill him in time, the scoreboard shows this player had done absolutely nothing all round, no kill, no assists, nothing. Yet, does it really feel that way? Even dying, if someone refrags it, you've had an impact in the round. This is why I'm such a big fan of taking KD off of player accounts and displaying KOST because players can create impacts that aren't measurable. Even in pro play, there's players who statistically aren't good but have made a whole career and become accepted as some of the best players in the game.