I noticed that the shredder can't shred everything craftable, but only some stuff.
Sometime you find an abandoned base, and you're looking for extra scrap, sometime you built something on mistake (or you want just to upgrade the platform it is built in). Also, everything you create with the vehicle printer is permanent.
Often I have to dig a "shame hole" where everything I don't need gets dumped. Like abandoned platform after I build a base on barrens to feed on a huge broken complex.
So a solution can be more shreddable stuff: platform, what is on platform, rover, large