Is attrition good for a company ???

The first thoughts of anybody on reading this topic would be ensure if am sober or not gone mad. As a HR professional even the mere thought of a high attrition can cause madness to a person more than Rakhi Sawant stunts. But i was discussing with my cousin Satish Salivati (Head Services Delivery, Asses people) and i was discussing enthusiastically about exit interviews and attrition when he put forward a nice idea which he said was shared by quite a few in the HR community that an attrition is like an inflation to a moderate extent like 20-25 % its actually good. Why?? well the potential answers can be
1)Brings fresh employees and freshness into the organisation.
2)Ensures the burden of promotion job increase is removed.
3)No use of trying stop people from leaving not all people can be same
4)Ensure you use his help to find an adequate requirement

It does not matter which people are leaving even if the highest performers are leaving take it for good after all the organisation is bigger than the individual and then it will open chances for others

Let us take an instance of employee D who is winning the best employee award and has been outstanding in contribution for five years and when he decides to move on this will create for someone else to come into this space and ensure they step up so that is the whole deal

Cheers
Arvind