Exactly. Perhaps they'll steal your human-built stack, too. And since you took the wall, their stack still stands... it would also be in your interest, i think, not to shut your opponent out. Remember, own score+2(opponent's). And if it's not a shut out, there's always a chance a good bin stealer could gain points. And remember, the hill is 50 possible points. The automation is important, but nothing is guaranteed until the power is off
(Or maybe someone will have a few coasting bots or unstable stacks, so a few seconds after the power is off...)