Why Does Age Matter?

The morning after the election announcement that the centralist Emmanuel Macron had won the French Election over the far right Nationalist Party leader Marine Le Pen, the sound bites were all about the wife, and sadly not so much the supportive role she played, but the age difference between the two.  When will it become okay for a younger man to be with an older woman, and not have it seem like it's an enormous favour to her?  

How many times have we seen a huge gap in age between a winning politician and his wife?  Hmm, the Donald and Melania - same difference of 24 years.  The day after THAT election garnered a lot of press as well, but the topic of why Melania at 47 was with the Donald was not the hot topic.  It's not so much his age, as his personality that we question the reasoning.