Instead of producing junk that people only buy because they can't afford quality, every worker will be able to produce quality products for themselves and others, and know that other workers will be doing the same. The workday will be shortened. The people doing those jobs now, will perform work that actually produces goods and services that people want. People will gain respect for doing jobs that others might find unpleasant, or the unpleasant jobs might be shared around. Many of the unpleasant jobs could be made more pleasant and some could be done away with.
People are different and have different needs.
Under capitalism, there is a very large industry devoted to creating needs. Capitalism requires consumption, whether it improves our lives or not, and drives us to consume up to, and past, our ability to pay for that consumption. On top of that, goods are not built to last because that would interfere with profit making. Socialism will be a very different society. Goods will be built to last.