I agree with your premise though why not simply give a saline solution?
Moderna vaccine mRNA-1273 and Pfizer vaccine BNT162 both made for covid. They're bad but NOTHING compared to Moderna's mRNA-1345 vaccine for Respiratory syncytial virus (RSV) they're working on.
I don’t really know, but my suspicion is that we’re seeing a group of moderately safe and mostly effective vaccines being rolled out in order to gaslight the public into accepting mass vaccination. That’s not to minimize those who have died or suffered from the vaccine. But on a percentage basis they represent a small portion of the population. I have a number of family members who have taken the vaccine and none of them have suffered ill effects (at least not yet). In addition the vaccines have given them piece of mind from their self imposed paranoia over the virus. Most of my family (aside from my elderly mother) are in low risk categories, but they’ve all bought into the propaganda. This experience only reinforces in their minds that vaccines are safe. That’s what concerns me.
It’s the next generation of vaccines, such as the Moderna mRNA-1345 that you mentioned, that have me worried. The cabal think long term and probably understand that a dry run like this that “proves” the safety of vaccines is necessary first in order to gain the trust of the populace. I think Trump’s comments about the vaccines should be taken with this in mind. He vouched for the vaccines. Maybe he was wrong to do so, but at least from a macro prospective, this particular crop of vaccines may help more than hurt, especially if they end the lockdowns and the cost to the economy and to lives that have resulted. He wasn’t giving a blanket endorsement of vaccines in general, nor did he say that people should be forced to take them.