Gentlemen, mRNA vaccines are specifically designed to trigger an immune response that develops antibodies. That immune response is essentially an inflammatory response that will cause tissue damage. It is an inevitable side effect of how these things work and shouldn't surprise anyone. Some people will die as a direct result of taking the vaccine. It is inevitable.
Taking a vaccine is about trying to reduce total risk. You are reducing the risk of dying from a disease, but accept a certain risk of being damaged by the vaccine. What matters is that you reduce aggregate risk. Even though the vaccine has risks of its own, it is still worth taking if it reduces risk overall. In much the same way, seat belts reduce your risks of dying in a crash, but may impede your escape.
The reasons the coronavirus vaccines are controversial:
(1) Risk from COVID and risk from the vaccines will always be different for different people. For some people, the vaccine will carry a greater risk than the disease itself. To coerce people into taking it is immoral;
(2) The vaccine was developed in a hurry and there isn't good understanding of its long term health impacts. What if we discover in five years time that it has caused cardiovascular damage?
(3) The politics behind the whole corona virus issue is completely toxic. There is now a political divide between those of the right that are naturally sceptical of coerced medicine and those of the left, who tend to favour centralised control over personal freedom and want to force the vaccine on the people out of spite for daring to question their authority. Neither side is objective or rational.
(4) Yyou have corporate interests that have invested a fortune in developing the vaccine and want the biggest return possible. They will use financial leverage on politicians to sell as much vaccine as they can. They will suppress any reports of health consequences. They will attempt to demonise any opposing voice. They will use their influence to coerce compulsory vaccination, against the wishes and best interests of many people.