Is everyone supposed to personally fully read every individual scientific study? That doesn't scale.
The only way it works is to have experts you trust to give you the truth, which is what the scientists are supposed to be, but the funding source undermines the trust.
But if the topic interests you enough for you to comment about it and there is a research paper that you can read, then just read the dang paper or let other people make decisions for you. Nobody has to give you the truth. And, on top of that, even if the results of research are quantified, there may not even be an unquestionable “truth” — the implications of the research can still be up to interpretation.
Then you have to figure it out for yourself. For everything. Which, again, doesn't scale.
At some point you do need to trust some people to make some decisions for you. But what kind of fool trusts someone with a conflict of interest?
Science isn’t a matter of trust, it’s a matter of verifiable results. The results of a scientific research paper must be repeatable by a third party following the same methods. Go see the merits of the research: it’s methodology, its results. If everyone simply looked at a list of funders and went “welp... this research is biased and invalid”, then we would have hardly any “valid” research.