Now whether or not they actually do a good job at that task is a different question.
It's unfortunate that you'd expect millions of people to individually "do research" (i.e. consult their crystal-stroking astrologist nutjob friend on Facebook). There is no reasonable way for individuals to make informed decisions regarding each individual item they may eat.
The Good Place has a great little clip about just the difficulty of buying a tomato: https://www.youtube.com/watch?v=R8m_5HDZF7w