How? I barely have enough time to do my day job. You think I have the time or expertise to research the origins of a virus?
Where does it end? Do I grow my own food? Make my own clothes? Build my own car after mining ore, smelting it and doing a million other things?
(The most important takeaway is to ignore Twitter - not "social media", but specifically Twitter).
At some point, you have to trust someone or some institution or organization or system.
My point is that maybe you shouldn't stick your oar in in that case. The polarisation was exacerbated by a lot of non-experts who not just trusted the WHO (reasonable in itself) but felt the need to pile on anyone who was questioning them.