If you've been married for 400 years, as I have, it's nice to experience first love again and you can vicariously through a book.
Pop science goes flying off in all kinds of fashionable directions, and it often drags a lot of SF writers with it. I've been led astray like that myself at times.
Everyone has to make their own decisions. I still believe in that. You just have to be able to accept the consequences without complaining.

