I think he wants to spread awareness that people in power can use technology and medicine to widen the class divide, and biotechnology shows signs of going that direction.
I think that a biohackers’ line of reasoning goes: the same way that some pills once existed as ground-up herbs, today’s biotech (and vaccines) started as ground-up biomaterial.
Of course people have been hurt from eating herbs and injecting biomaterial, so testing and quality control will always be a massive issue.
I still see a biohackers’ rebuttal, however: sometimes people are hurt by their own cooking, or restaurant food, so the issue of quality control among mass-distributed biomaterial is not totally new, and not insurmountable.