The reason it sounds counter intuitive is because is isn't true. If perineal pressure is an issue pointing the saddle up, even a little will not help. I have seen this advice offered as an aid to relieving weight on the hands and finger numbness. I see so much advice offered here that is clearly just a forwarding of information that has not been parsed through the offerers own experience. Here is what I can offer on the subject based on my own experience:

Knee's will indeed hurt if a saddle is too low. If perineal pressure is an issue get a saddle that does not have a perineal area i.e. an anatomic or cutout saddle. Place it level or tilt it slightly up but if you tilt it down, even a little you will be very annoyed at having to constantly push yourself back onto the saddle. Bring your saddle forward enough so you can easily rise from the saddle as you go over stuff in the road. When you can lift yourself off the saddle without even thinking about it you will also be able to spin without thinking about it. Don't take my word for this, experiment, yourself. Find the correct height for your handlebars and seat and the proper amount of forward or backward set of your saddle and the proper degree of nose (up) tilt by experimenting. When you know what feels bad you will know what feels good.

H