Kenneth, I’m not entirely sure what you’re referring to. If by “these chemical untested concoxions” you mean the covid vaccines then I fundamentally disagree with your description: they have been tested very very thoroughly and their use has been monitored in almost excruciating detail. Certainly no top doctors would recommend normal healthy individuals avoid them, though those without scruples or ethics who hope to gain something for themselves in some other way might do so.
Science is advanced by experimentation, hypothesis and iteration - essentially following the data. Free speech does not play a significant role in the manner I think you’re hinting at.