Is it normal for brake rotors to wear out?

I own a 2013 Hyundai i30 Tourer, which has just done 58,000 km and had its four-year service. At that service I was advised the front brake rotors and front and rear disc pads needed replacement. Apparently the rotors were below the wear limit making machining not possible. I have owned a number of cars in the last 20 years or so, all of which had done well over 100,000 km and I don't recall ever replacing rotors. While I can accept the disc pads perhaps, I was very surprised that the rotors had worn out. Do you think that is normal for this particular i30 model?