There is no harm in subjecting the status quo to scrutinty.
There have been instances where there were harmful inactive ingredients in some vaccines.
There was suspicion that experimental vaccines administered to soldiers in the First Gulf War may have contributed to Gulf War Syndrome experienced by veterans.
Healthy public debate is essential in Western Societies. Those who seek to silence dissent do so because they are too lazy or too wrong to engage in public discussion.
Eradication of polio and smallpox was one of the greatest achievements of the 20th Century. These vaccines are victims of their own success because present day people lack first hand experience and knowledge of the suffering those diseases inflicted upon previous generations.
We have the luxury of living without polio and smallpox because of vaccines. Those vaccines have allowed us to be alive to have these public discussions, debate, and disagreements about new vaccines.
Vaccine efficacy and value should always be supported by data, not groupthink.