They should get a dog - it forces you to wake up at a certain time - you get some exercise in - you go outside and have micro social interactions - if you take them out at a certain time after work, it’ll come let you know that it’s time, so you won’t overwork - they’re great antidepressants - great for company when your partner is gone 4AM to 7PM
You can get exercise and social contact besides (although on the latter point, animals can provide some comfort, but they don't sub for a social life). I think the valid reason for wanting a dog is wanting a dog, and tolerating if not enjoying the lifestyle that it requires. There are a lot of owners out there who think they want a pet, and then they end up neglected or at a shelter (or the owner does their job, but regrets their choice).