Fushimi Roku was just saying that casually.
He had no intention of going at all. The current diagnosis results were quite good, and he was very satisfied. If anyone ever questioned his personality and mental state, he could shove his diagnosis of being a sunny and cheerful young man in their face.
If that psychologist really was competent and diagnosed him with some mental illness, wouldn't that be trouble? You can't just check everything, right? Who knows what they might find.
Fushimi Roku had a sense of this.
But he didn't really want to go home either, mainly because he didn't want to face Minamoto Tamako. He hadn't figured out how to leverage what happened last night and needed time to think about how to take the moral high ground—whether it was him being tied up play or Minamoto Tamako being SP, neither was easy to explain.
So he decided to stay at the Kazama family for the time being to avoid the spotlight.