Although this is possible, we need to balance out their information with third party analysis as well. The incentives are misaligned as the companies are guaranteed to earn public money for creating these and continually convincing nations and municipalities to purchase them, under any excuse possible.

This doesn't need a polarized political climate to understand, although both conservative and progressive parties within nations do purchase these, despite how their people align to particular parties and correlate to usage/avoidance of these things or even make their choice their entire identity.

It also doesn't require the depth of a conspiracy to understand or invalidate.

Health directors, governors and private organizations are incentivized in differing ways. The ways they talk are never the full picture. The company making a treatment cannot be the only source of the need for the treatment, neither should their publicist, neither should a study funded by them.