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?
Trust the experts if you've no time for more, but this is the likely result.
Put time into your own research, and maybe you won't be caught off guard.