Besides, when you sell the GPUs the fans are brand new and thats a benefit too.
This is an advantage if the seller deceives the buyer and says that the video card has not been used much and looks like new

And before selling, I change all the fans, because the old ones either work poorly or have been dismantled a long time ago.
A new fan for aliexpress costs 7-10 dollars. The video card also looks good, almost as good as new.