One point I think you might have missed:
Concrete sealers will also protect concrete from deicer materials, which can increase the freeze-thaw cycle of water inside of concrete. As that water expands and contracts, it will break the concrete surface down. Additionally, the deicers will remain in the concrete as the water evaporates, crystallizing underneath the surface and creating pressure that will make the surface chip and split.
Sealing these concrete surfaces will protect them from that kind of damage, leading to longer-lasting, more attractive concrete. I recommend Concrete Treat for these kinds of applications. You can order it online.