I don't understand why anyone uses recruiting agencies, honestly. When I was starting out I went to the agencies and they couldn't help me because I didn't have

I don't understand why anyone uses recruiting agencies, honestly. When I was starting out I went to the agencies and they couldn't help me because I didn't have "5+ years in .Net" (the year it was released) and I wasn't willing to lie because I didn't feel comfortable with it. THEN, once I was a little more established, I've had in-company recruiters coming to me with offerings pretty much daily. My LinkedIn profile specifically says to please not contact me with job offerings due to the fact that I'm happy where I am and I STILL get 6-8 offerings a week through that vector alone. I'm not famous, I don't market myself, I'm not an avid open sourcer... I'm simply competent and can show it. Is this not standard?