What Tesla said was not wrong; Wang Dadong's modified hand indeed benefits him.
Although it doesn't significantly enhance Wang Dadong's combat power, it greatly increases his survival ability.
Just like in the time he jumped off the plane, if his hand hadn't been modified, perhaps he would be the only one to survive.
And in previous battles, his left hand had blocked quite a few fatal injuries for him.
Imagine if not just his left hand was modified, but his entire skeletal structure—now that would be terrifying.
He would be completely impervious to most firearms.
However, Wang Dadong doesn't want to be turned into a half-human, half-metal monster.
If there's a way, he would still try to restore his modified arm to its original state.
What Tesla said was true, but it doesn't mean Wang Dadong would be grateful to him; he clearly remembers Tesla wanted his memory cleared after the successful experiment.
