[treis]

>Just how is this a good advice if it's a bad thing if most men do it?

Because if you don't your outcome is worse than it otherwise would be. It's like weight cutting in boxing. Ultimately it serves no purpose. Both fighters do it so neither gets an advantage. Neither fighter can stop doing it, however, since it would give an advantage to the other fighter.

>A better advice would be for men to understand this tendency of women, what it means to be attractive to women and make an informed decision if they want to play the game of becoming more attractive to women.

These aren't mutually exclusive options. Making yourself more attractive will, of course, increase your chances for success.

>They can also learn to reverse the game in their thirties and only date women 4-5 years younger, thus penalizing women who wait until their last fertile minute to settle down.

Excluding a group isn't going to increase your chance of success.