I think it's one of the most obvious plot points. Besides Ian working for him, even if the writing contest is anonymous Seymour knows which one is Ian's and he's one of the judges as well as the owner of the publishing company. Maybe you can counter Seymour's influence and win the book contest anyway if you have the right relationship with Minerva and your book is good (there are three judges). But Ian would still be working at his company and Seymour would still be the publisher of the book, Seymour has strong blackmail leverage.On all my playthroughs Lena stays away from Seymour because I hate controlling pricks like that. Do you think Seymour will try to mess with Ian's career knowing that Lena is his girlfriend and will that have any effect where Lena agrees to do stuff for Seymour?
Maybe Ian will be forced to choose between corrupting his relationship (possibly also betraying Perry to get some shit on his dad for the mayor election) with Lena or sacrificing his career's success (maybe Victor's smaller company publishing his book if it's good). Or maybe there will be some kind of plot of Ian, Lena and possibly Emma to bring down Seymour somehow.