>>11198504High quality people aren't main user of dating sites. Sure you can say that % of people who started dating online is on the rise, but dating sites aren't the only place to met.
If you can't find anyone who is decent in your social circle, there is high chance that you have too high standard of opposite gender. It's true for men, but especially true for women who are much more pickier. Also, on dating sites women are usually around of 20% of users, meaning that they don't really have to spend time on worse looking men.