>It seems like a mistake. If you have one persona, that means that you need to optimize that persona for your career and ironically it feels more stiflingly conformist.

With a name like "Facebook Dating", it doesn't sound like they're trying to enter the Tinder-esque hookup space. If the product is focused on long-term relationships, the dating profile and the career profile probably won't have that many differences. At least not for most people, and Facebook (the website) is clearly aimed at "most people".

After all, a Tinder-like app would already face huge competition, whereas the market for online dating services that work for older and/or more conservative people has been largely stagnant and is currently fragmented across sites like "FarmersOnly". You don't gain traction by solving a problem someone else already solved. Old people are lonely too.