Earlier quoted context omitted.
At the risk of really straining the metaphor, one of the arguments is that not all the pedestrians are able to be fitted with those force fields. The force fields are also not 100% full-proof, although they can help reduce the impact.
So then you heckle the pedestrians without a forcefield for not getting one? That is what we are talking about here, why would you do that?
The wilfully unvaccinated (the "ran their car off the road because they perceived (possibly incorrectly) some danger that they were attempting to avoid" group) are making it harder for those that are medically unable and those with chronic health concerns as the less virus circulating the less risk for the more vulnerable among us. While this generates feeling of ill-will within me, I personally am not advocating the heckling of anyone.
My, "not 100% full-proof, although they can help reduce the impact," analogy was addressing that while it is still possible to catch COVID even if you are fully vaccinated, it is less likely and usually the severity will be less than it will have been otherwise if you do catch it.