A few points:
1) From what I've read, the PREP Act is not a blanket order for all vaccine development. In fact, from the website:
The PREP Act empowers the Secretary of the Department of Health and Human Services (HHS) to immunize “covered persons," including pharmaceutical companies and healthcare providers, that make what are called countermeasures including vaccines from liability in a declared public health emergency.
On March 17, 2020 (effective February 4, 2020), the Secretary of HHS declared the coronavirus pandemic to be such an emergency.
Thus the manufacturers of COVID-19 vaccines such as Pfizer and Moderna enjoy sweeping liability protection from personal injury or product liability suits.
2) Which, as I've said, is 1000% FINE AND GOOD, except in the cases where one was unreasonably compelled to take the vaccination. If being "mandated" to take a vaccine, you should not have legal impunity. Where it is a voluntary act of vaccination, protect the organizations who fast-tracked this to market all you want.
3) What I described above is a moral hazard and one that I am uncomfortable with. You and others might not be, and that's fine too, because reasonable minds can disagree, but it's a weird take to call someone bad faith for disagreeing with you.
4) This ammendment from last year actually makes sense to me now that the vaccination is 100% voluntary and people aren't at risk of losing their livlihoods or reasonably expected rights and privileges for not getting the vax: Eleventh Amendment to the Declaration under the PREP Act for COVID-19 Medical Countermeasures