Examples of when it is not advantageous to be lightweight

[yash101]

i want to do pathfinding this year, and I've figured out that it would be extremely important for the robot to by capable of changing directions quickly and accelerating quickly, so that the robot will be able to follow the path and change paths with almost no smoothing and any overhead of acceleration time.

I think that this means that the robot will need:
-Tons of power in the drivetrain
-Lightweight
-COG: Center, at the bottom!