Yes, it's a legal requirement coming down from Alberta's Municipal Government Act that we are to conduct proper community engagement and hold a public hearing for any modification to statutory plans like the Land Use Bylaw.
Manitoba changed this requirement recently, requiring some threshold of signatures before a public hearing is required, something like a few dozen, or a couple hundred for Winnipeg.
I should add that there is no requirement to do these things lot-by-lot, or reactively. We rezoned the entire city with one big public hearing, which saved a lot of time from doing thousands of tiny ones.
There's also no legal requirement for journalists to bias their coverage of housing issues so radically toward one side, but it generates more outrage and thus ad revenue.