Obviously, the answer will vary depending on the circumstances of each individual game. As you are asking a general question, I am answering generally about the tactic "remain in base and poke out to take jungle farm"
"Because having an entire team camping in base allows the enemy free map control and they can push lanes, farm and push lanes and take objectives allowing their lead to grow even larger. Having one player camping at the base turret means: A) This player is contributing nothing except clearing minions from the turret, which will go down eventually anyway from the minion damage. B) Allows the lanes to constantly be pushed to your base, meaning even if your team were to gain an advantage (e.g. Favorable team fight) you could not do anything with it. C) Forces the rest of the team into a constant 4v5 situation. D)...."