Because in CHIA you can successfully mine on HDD.
If STORJ is located on disk, then its random reading interferes.
The person does everything right - turn off STORJ.
Now people start to simply turn off the STORJ nodes, but within a month when space for CHIA is required, the STORJ data will be deleted. Nobody even GE will do it.
STORJ’s profitability is now 30 times less