You need to be able to have multiple nodes in one LAN access ports on each others' containers without exposing those to the world and without using additional firewalls in front of the nodes.
That's why kubernetes ended up removing docker support and instead recommends podman or using containerd natively.
Yes, of course there is error correction. Also, while the SSD is on power, it'll constantly go through all data and fix the areas that are starting to deteriorate.
But this does mean an SSD left without power will slowly lose data over months and years.
This also means that writing data is much slower and the SSD can handle far fewer writes. But the tradeoff is that TLC and QLC SSDs can handle 2× and 4× more data than MLC SSDs for the same price.
That's why MLC SSDs are primarily used for professional use and TLC and QLC is primarily used for gamers.
Some TLC and QLC SSDs even allow you to choose how much of the SSD should be used as SLC/MLC space (4× less data, 4× faster writes, 4× more endurance) and which part should be used as TLC/QLC (4× more data, 4× slower changes, 4× less endurance).