No, that's just continuing on despite people being paranoid.
A lost game is when you have just lost your inhibitor and haven't taken a single turret, and your ADC isn't going to be able to take turrets quickly.
The probability that you ace them then is low. And even if you do, you now have to back to kill the supers before winions destroy you. Which means sending back either your ADC or your APC to kill them. Since one of your carries is dead (because we're trying to suspend our disbelief, not assume a miracle as a given), along with one or two of your frontline, you have 2 or 3 people, one of which can kill towers quickly AND clear waves quickly while the other one or two can just waveclear. Hopefully.
So you send back the person who can waveclear but not siege. So you have 2 people on the tower. And you killed one! Yay! Oh wait, you need to kill two more before you can take the inhibitor. And you need to walk to them, which takes precious seconds not hitting a turret.
So realistically, you probably are going to be able to take one turret, and maybe start on the next one.
So yeah, the enemy needs to throw two or three times MAJORLY in order for you to at least be even in towers. That's not even counting gold differential.
I mean, if you're going to buy me a lotto ticket if I don't surrender, ok.