The phrase "advantage for someone" is correct and usable in written English.
It can be used when discussing a benefit or favorable condition that affects a particular person or group.
Example: "The new policy provides a significant advantage for someone looking to advance their career within the company."
Alternatives: "benefit to someone" or "edge for someone".
"It's an advantage for someone who struggles on the green.
"The advantage, for someone like me, is the access," he says.
Tavis Smiley, the host and commentator, discovered that the complicated, decentralized world of public broadcasting could be an advantage for someone like him.
And that is not an inconsiderable advantage for someone writing about contemporary ethical issues ranging from genetic research to self-interest.
"There were a few times during the project when it became an advantage for someone to tell me, 'No, you can't do this,' " Ms. Oring said.
But it also gave Mr. Schundler more time and money to broadcast his message -- an advantage for someone with low name recognition.
Specifically: a primer on how to craft a powerful Washington image, and the advantages for someone in the executive office (or nearby) that derive from a close working relationship with a designer.
Doing business development in a startup has some advantages for someone who is just starting out in this career path, according to Sabry.
"And here we were with his typewriter, his photographs, his artwork, his furniture". There were no air conditioned trailers for the cast or well-equipped catering trucks, but there were distinct advantages for someone shooting a period film — the majority of the cars on the road are from the 1950s, and Havana is still mostly free of advertising and other signs of modernity.
If his life has been "deeply altered" it is because he has horribly altered another human being; because he made a reprehensible choice to take advantage of someone for his own pleasure.
Don't think it is your fault: it's the predator's for taking advantage of someone.
