The idea of deworming in healthy individuals in developed countries is the domain of alternative medicine, where people tend to use questionable supplements or under dosed pharmaceuticals for peace of mind.
However, even antibiotics aren’t as safe as some of these people think. One of my acquaintances died following complications of antibiotics that he purchased over the internet and self-administered. It was a rare outcome of using the antibiotic, but statistically it was several orders of magnitude more likely to cause problems than the condition he thought he was self-treating.