To be honest, I found the exact opposite to be true. I agree with the author regarding the happiness during grad school being directly related to being married.
As a matter of fact, I don't think I would have finished my PhD had my wife not supported me mentally, economically, and in spirit. I've observed our single students struggle, complaining about having to do chores after classes, clean, cook, look after themselves. Whereas my spouse was supportive and understanding, she took a colossal load off my shoulders - I could concentrate on my studies and had little to no worries outside of school. We both worked, but she worked full time to support us and got a master's degree, so she knew all too well that grad school isn't peanuts.
I think it's more so about having a good spouse who is understanding and supportive, who can meet you halfway.
As a matter of fact, I don't think I would have finished my PhD had my wife not supported me mentally, economically, and in spirit. I've observed our single students struggle, complaining about having to do chores after classes, clean, cook, look after themselves. Whereas my spouse was supportive and understanding, she took a colossal load off my shoulders - I could concentrate on my studies and had little to no worries outside of school. We both worked, but she worked full time to support us and got a master's degree, so she knew all too well that grad school isn't peanuts.
I think it's more so about having a good spouse who is understanding and supportive, who can meet you halfway.