//It would have been lovely if he had been his true self all his life. Gay men marrying in the dark days when homosexuality was illegal and could have a huge negative impact on a man's personal and professional life was understandable. This did not apply to Schofield - thankfully attitudes had changed before he got married.//
Or he was confused about his sexuality when he was younger? Fell in love with a girl, married and had kids. As time wore on, he realised that he gay urges, but kept them hidden for the sake of his kids.
None of us know what has happened, and nor do you or I have any right to second guess him.