This game has lots of downtime for the player. For example, a round lasts 100 seconds (then if the bomb is planted, 45 seconds until the bomb explodes). If you die early in the round, you are dead until the start of the next round. Worst case, thats 2 full minutes of downtime for a single player. On top of that the time to kill is VERY low. A single headshot can mean death before you can even react. Compare that to BO6 which in most modes will have an immediate respawns and a relatively high time to kill.

It's not something they are optimizing for financial incentives, it's how the game is played, and how it's been played for 25 years (the originator of the format is Counter Strike).