Just because they were vaccinated as children "without a choice" and refuse a mRNA vaccine does not mean they did not get the flu vaccine, or HPV vaccine, or others later in life when it was their choice.
Stop being so condescending.
If they had good reasons they'd find it in actual research, not 24/7 news, podcasts, and Facebook posts.
The research into mRNA COVID vaccines is tremendous, the scrutiny applied larger than probably any other medical treatment. More so than other vaccines. Yet it's the COVID one that gets the hate. It confirms that this isn't about facts or research, it's about feelings. They feel it's bad, and someone they trust told them it's bad too.