QuiltE

Hospitals and any institutions wash that way in order to "kill" bacterias, etc.

Normally, home cared for and loved quilts would not get that treatment.
However, some might do so at home, for the same reasons.

Or of course .... it could easily happen accidentally, b a good meaning person, who is not familiar with if quilt-care, but is helping out by doing laundry while the quilt owner is ill!