The ADC and SUP shouldn't be able to down a full tower pre-10m alone without a full item yet
If they kill the bot lane, or force them to back, the ADC and SUP should not be able to take out the tower by themselves in the time it takes for the opponents to respawn and run back to lane when neither of them even have a fully completed item yet. I understand 3 players doing it, but not just the ADC and SUP, and definitely not before 10 minutes.