IMHO pillows with shams are seldom slept on. Most folks just move them onto a chair for the night and use the ordinary cased pillows to sleep on. I still wash the shams with every change over; likewise the quilt, pillow cases and sheets.
Honestly the ones I have are just not designed to be washed twice a week, they will fall apart. I do understand what you’re saying though
If you have two on the bed, can you have six and rotate them so that they only need to be washed every week and a half?
Someone’s been drinking! LOL!
You are SO right!!!