Empathy is a faculty or characteristic.
It will change the way a person that has it experiences the world.
Think of one of your basic five senses. Your hearing, touch, eyesight are all probably a big part of how you experience life and your brain works, but a deaf person, or person without touch, or blind person, are not necessarily less intelligent.
Empathy might have played a role in helping people band together in the past and work cooperatively and build a pro-social and functional world.
In the past.
In (most) of the world today, having empathy is like getting your DNA checked and finding out you have a susceptibility to cancer or any number of horrible genetic diseases.
It essentially sentences you to being a host for parasitic humans. You will be victimized by many (genetic lottery winner) humans that prey upon others by virtue of having no empathy. Taken advantage of, harmed for entertainment, suckered of your time and resources.
This includes, by the way, falling victim for any number of guilt-ridden social campaigns to modify your behaviour, get you to pay or follow 'moral leaders' that promise to have answers that fix the world and all that. Those running charities and 'fighting to make the world a better place' are just as evil as the corporate CEOs, fleecing the fuck out of gullible people and living the high life.
However, being born without empathy, a seemingly atavistic quality, is a superpower right now. The world is yours to use an abuse IF you also have high intelligence. With both low intelligence and low empathy, you'll just end up in prison.
Hard to say how long having no empathy will be a special gift. This is just a personal opinion but consider the possibility: the percentage of the population with no empathy is rising rapidly. Various reasons. Just an invitation to look around and mull it over.