I couldn't disagree more. You can easily twist his letters to his son to create this narrative. If you read it as a whole his message isn't at all anti-marriage, he was a devout Christian who believed wholeheartedly in marriage. His message was that marriage takes sacrifice, faith, and a conscious effort (in his opinion specifically on the side of the man). It's a bit Kierkegaardian.

Well, when it's put like that ^^.

It's just that I never thought about it in that way, that outlook took me by surprise :).

I read the Howard Carter biography more than 25 years ago and I don't remember much about that aspect, I was more geeking about lotr at that time than Tolkien's opinions.