If I had to fall in love with all the actresses I play with and live the situations I have to play, I would be lost ! I need to be solid and know who I really am to have fun in making something else. I noticed, while talking with other actors, that they often let ambiguity float. I don't like ambiguity, it's dangerous. I need distance. I also think that the result would prevent the audience from identifying to the characters. If you feel the things too strongly, you simply close the doors.
But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And when they clash, then we know that there is a reality; something that can inform us that our ideas are mistaken.