Hmm... Interesting thought from the psychologist. Can't say I necessarily agree or disagree with them as I'm not a cat! 😆
Yes our preference would be to have indoor cats (due to their safety and wildlife safety), and we adopted a senior cat that stays indoors (other than supervised walks outdoors on a leash). Though in the case of our parents cat, we think it's mainly due to him being a stray for the first ~1.5 years of his life, he HAS to go out. Won't go to the bathroom indoors whatever we do for him, and continuously begs to be let outside etc.