One problem is that people are self-treating with it. Eyeballing measurements of medicine bought at a farm supply store and sticking it in your child's mouth isn't good.
Furthermore, enabling random unproven treatments is on the same level as saying we should stand by and support homeopathic treatments as a valid alternative to vaccines during a pandemic. We don't let people choose between a tetanus shot or a cup of green tea and olive oil when they step on a rusty nail. It doesn't make sense to let them choose between worm meds and a vaccine when it comes to covid.
Furthermore, enabling random unproven treatments is on the same level as saying we should stand by and support homeopathic treatments as a valid alternative to vaccines during a pandemic. We don't let people choose between a tetanus shot or a cup of green tea and olive oil when they step on a rusty nail. It doesn't make sense to let them choose between worm meds and a vaccine when it comes to covid.