If you are strong enough to lift a 1600 lb fish tank, then you are strong enough to open a car door in water. I am not strong enough to open a car door in water.
If you are strong enough to open an empty fish tank, then you are strong enough to open a car door in water once some water is in the car. I am strong enough to open a car door in water once there is some water in the car.
Yes, yes, physics folks itching to talk about pressure at depth, and PSI, and delta P.