In Canada the resistance to change is fueled by “this is how we’ve always done it” which is false as Canada was founded before the car was made. There is also a conflict of interest to reduce dependance on roads as we have a decent auto manufacturing sector and many people rely on jobs related to roads and cars. With zoning there is hesitancy to change because many of our politicians are land lords using single family homes as rentable apartments and they know that their property values will drop if we start building real multi unit residences and affordable housing.
Our cities have been caught in this style of development for decades and to try to change it really goes against the current political grain. It takes a brave and determined politician to try for change and they will meet resistance from their colleagues and parts of their voter base the entire way.