11 Iyar (Emor)

Vayikra 21,6 says "Kedoshim yihyu..." (they shall be holy...) and Rashi explains that means even against their will, have to make sure they're holy. So why do we need another drasha two pesukim later (vs. 8) on the word "Vikidashto..." (and you should sanctify him...) Rashi says it means even against their will for example if he doesn't want to divorce his wife who's unfit to marry a Kohen we force him to. Why on Earth do we need two drashas to tell us the same thing especially when the first one was two pesukim ago?