so basically you want teams to be stupid on purpose?
lets say the score is 2-5 and its currently 3v5 in this round.
If you save, you lose this round, its 2-6, you can drop next round and you are right back into the game. Maybe get a couple of exits and then the economy is balanced and the game is still open.
If you dont save and rush, the chances are you will get shrekt, you lose the round, its 2-6. Worst case you get reset, got to force and then eco, so you will find yourself 2-8 with a shitty buy, whereas the enemy team will have had 2 rounds to make enough money that its literally impossible for you to reset them for the rest of the half. Same if you can just do a straight up eco.
Saving does not only stop you from throwing rounds for no reason, it also keeps the enemy team from developing their economy and keeps them within range of a reset.