It's more complicated than Sim City ever was.
jzymbaluk said "Why shouldn't land owners be able to build whatever they want on their own property? It's not your backyard, it's your neighbors property" which screams "No zoning" to me.
Then "saagarjha" said "As long as they follow the noise and disturbance ordinances, then sure." which screams "the market will naturally balance homeowner satisfaction with factories/businesses".
I responded with "Are you suggesting that nightclubs should be banned altogether? If not, then where do you suggest to put them since they are inherently noisy?" as without zoning, homeowners, businesses, and factories could be right next to each other.
I was responding to (middle OP?) "Why shouldn't land owners be able to build whatever they want on their own property? It's not your backyard, it's your neighbors property" and "As long as they follow the noise and disturbance ordinances, then sure."
Those former seems to suggest getting rid of zoning altogether which would cause horrible negative externalities IMO. The latter assumes noise disturbances would somehow balance the market which I highly doubt.