Moderna has a long history of promising to change the world, and failing to deliver (mostly due to safety concerns). They abandoned all their early projects and shifted to vaccines because multi dose treatments proved to be too toxic. Maybe they have solved all their nanoparticle issues, but even the current vaccines have been shown to be
highly inflammatory in mice. I think it's obvious that they are safe for most people, but long term issues haven't been studied, and people with autoimmune conditions are likely to be at higher risk for developing side effects. Combine that with the fact that their efficacy numbers keep falling and it's pretty clear that people will need repeated injections, and I don't see why people shouldn't be allowed to choose their risk - even if you disagree with it.