Why service centers do not want to make the drive workable?

Question

Hard disks

Whether or not operations in the middle of the HDA of a hard disk make it impossible to further exploit it. Everything that we work with the “patient” and the “donor” can at the same time confirm your data to the maximum extent possible. To open it just open the cover of the working hard drive and immediately close it - it is no longer possible to work normally. This is a technological feature of accumulators of this type.



this is done in their class 100 super sterile room.
Why can't the disk be used?
Just wondering

If just from a financial point of view, then??? I have not. Like, we will restore the data, and then pshol out.
But technically it's possible to do it.