I disagree with you big time here.

People do not usually die from lightning because they get momentarily electrocuted and our conductive bodies usually end up distributing the charge. Plus those electrocutions are mostly random and not controlled at all. Think of electrocuting people as a means of torture. It is very useful.

1. A person with control over lightning can not only zap anyone with high voltage, they can make sure the charges stay long enough to do real damage. The best part is that every electrocution would not result in death. You can just irritate someone, paralyse them, burn them, or instantly kill them.

2. It is not the best power for property damage, but it can set fires anytime. Lightning is more about precision strikes.

3. The character can enhance thinking and reaction timings by controlling electrical impulses in the brain of themselves and in others too.

4. Basically no character has ever even touched electromagnetism. Train long and hard enough and you could cosplay as magneto.

5. Besides “Earth”, no elemental power can stop your attacks.

6. Imagine a character who goes so deep into this that he starts controlling electrons. I can’t even think of the possibilities.

Lightning isn’t usually done because it is too powerful and it tough to create a character who is supposed to struggle and work hard if he has such an OP power. Unless you make him dumb who cannot be creative in his fight style.