This is called a strawman. Please try better arguments.
People love to talk absurd nonsense about how zoning reform is a slippery slope to having toxic uranium mines dug next to their driveway.
What they really mean is "There will be more traffic, less parking, more noise, more public transit blah blah if someone builds a 3-storey apartment building in my neighborhood." It's understandable to desire this not happen but, like, you don't own the street, and you don't own the lot next door. Stop getting the government to impose your personal preferences on other people's property. If you want the neighborhood to stay unchanged, buy it and do what you want. Neighborhoods are for people to live in. Any zoning reform that allows them to do so safely and comfortably (note: but not necessarily stay the same) should be allowed.
And a suburban housing development would be a stupid place to put a pig farm or heavy-metal processing plant anyway.