There is a sound financial reason for that. I remember when my wife and I saw the movie Pearl Harbor, it was like we were watching two different films. Oh why did they have ruin a good war movie with a sappy love story I thought; oh why did they have to clutter up a good love story with all that war stuff, she thought. Typically, men want explosions, gun play, monsters, and car chases in a film, while women tend to ignore all that and focus on relationships. Films these days cost so much money that producers have to pitch them to both men and women in order to recover their investment.
When I watched PH, all I kept thinking was how historically inaccurate it was.