Normally, the images shouldn’t be damaged in the first place. I therefore fully understand your pain. That definitely shouldn’t happen. Have you ever let your systems run for a while without write protection? The plugin has caused a few problems in the past, maybe that is exactly why the images are getting corrupted.
Unfortunately, I don’t know of any way how to renew the image over the network without removing the SD card from the Pi and burning a new image onto it. I don’t think that’s possible.