how important are spring insulators?

I was working on my car and noticed my rear spring insulators are ripped and falling out. Even though they are cheap, to get them installed will be expensive, or time intensive to do myself. So from the pictures of the disassembled struts, the spring insulator damaged would cause bad ride quality, and 1/4 inch drooping springs. Is this correct? I have kyb agx and progress springs

Spring insulators help dampen vibrations that get sent to the coil springs. They also ensure that the spring is properly seated in the strut or coilover.