Thing is, vaccine damage does exist. There's even a compensation scheme for it. My sister, an LD nurse, cares for some patients who have it written VERY clearly in their medical records - their brain damage was caused by vaccination. Thankfully the particular vaccines involved were phased out (think one was the whooping cough jab in the 60s or 70s?) but it is certainly true that children can be damaged by vaccines. It's not as simple as 'people who don't vaccinate are bad and people who do are good'.
Vaccines are medicines and just like any other medicine they have the potential to cause harm as well as benefit.
Every time you take a medicine, you have to weigh up the risks. Do I need this medicine? What are the potential side effects and how likely are they to affect me?
The decision about whether to take a drug will be different for every person and every person is entitled to make up their own mind. When that person is a baby or child, obviously their parent has to make the decision on their behalf.
Personally, I weighed up the risks, listening to my colleagues at the time who were expert reviewers in drug safety and who said MMR was safe as far as the evidence that existed showed but the safety studies were insufficient. I chose to give ds single vax, including rubella, in order to limit any risks as far as I could while protecting him and other children. That decision was right for my ds in his circumstances. But someone who has one vaccine damaged child already, or who has a family history of auto-immune disease, is fully entitled to make a very different decision.
There's an MNer whose ds was damaged by vaccination connected with a history of severe eczema - she believes the very strong antibiotics he was put on to deal with the (potentially fatal) eczema contributed to his development of autism. And she knows quite a lot about this as she has a PhD in biochemistry (IIRC) and is studying for a masters, I think, in an area of research that relates to autism. Sadly she doesn't tend to post on these threads any more as she's too worn out arguing with the vehement pro-vaccine 'everyone who doesn't immunise is evil' brigade. Who are just as short-sighted as the 'all vaccines are evil' brigade. Life - and medical science - is more complicated than either of those approaches suggests.