My understanding is MicroSD “hardware” switch triggers a software based switch that not enforced by the hardware; that is, it is not designed security.
Even a “read only” CD-ROM if not verified on boot for tampering — might contain an attack, including: to just disable the disk from booting, among other things.
Even a “read only” CD-ROM if not verified on boot for tampering — might contain an attack, including: to just disable the disk from booting, among other things.