"DC is much safer compared to AC" This probably comes from the idea that if you get 230VAC through your muscles, they would repeatedly cramp and make it impossible to move away from the point of contact. Not sure if it's true but I've heard it mentioned many times. At any rate, that such doesn't matter in the slightest in case of overhead power lines, since those have far higher voltages and currents.

At any rate you only need some 10-20mA across your heart to risk a heart stop. DC or AC is irrelevant there. The average 230VAC connector in your home is fused to 15A and can deliver quite a current until the ground fault breaker goes.

This article explains the physiological effects of AC and DC.