I think the implication is that she's sophisticated and intelligent if she's a doctor, so she shouldn't be making such harsh, existential, and relationship-ending mistakes like this. There's a general trend when you ask a forum (especially a gaming forum) about cutting off family, friends, spouses etc. A lot -- not all, but a lot of these people are lonely and isolated and feel better when they can look at other people and feel like it's not so bad. Many don't have any compunction with telling you to get rid of your girlfriend at the drop of a hat, but would kill for any female attention for a moment. Don't ask a forum about whether or not you should cut people out of your life, for the love of god.