I don't fault any actor for having cosmetic surgery. Yes, it does remove character from the face, but that's the price you pay. Many actors would try to stretch the years a little for getting some more work in an industry that has little need for naturally aged faces.
Yes, you can quote a few who've gotten work in roles calling for older characters, but it's not the norm. Eventually, the plastic surgery ceases to help, but I can understand the need to do initially.
<-----I'M TOTES ROLLING MY EYES