No one is suggesting getting rid of industrial zoning. "getting rid of zoning" for the vast majority of people saying it means removing density restrictions and mixed use (business + residential) restrictions.
I lived a few miles away from the Texas City plant, growing up. A good, stiff, wind, and a penchant for rhinoviruses can solve a lot of chemical-plant-related issues.
"most" is doing a lot of work here. don't forget you probably don't want to live next to an airport, railroad, chemical plant