One of the best insights about covid is from Jane Goodall, who has warned that destroying wild Nature has boomeranged onto humans. I doubt most virus deniers know the word "zoonosis" but it refers to diseases that come from other species. SARS-1, SARS-CoV-2, HIV, Nipah, MERS and many others are due to diseases jumping from bats, chimps, etc. to humans. I find this more troubling than claims of a lab leak (which have yet to be proved, whether true or false). She's been vocal about this, a search will find lots of interviews with her. Facts matter.
I've seen an estimate that surveying all of the bat caves of east Asia for viruses that threaten humans would cost several billion dollars. A bargain compared to the disruption and a pittance compared to military spending. This Week in Virology podcast had a recent discussion about bat viruses found in a cave in Laos - it's not only China that is the reservoir.
There's also the threat of factory farming and antibiotic resistance, which could be a worse problem. I don't see conspiracy culture discussing that.