The first issue would be that the average person doesn’t know much about quantum physics (besides maybe a certain cat in a box).
The second issue is that, unlike classical physics, quantum mechanics simply isn’t intuitive. Everyone grew up learning classical physics not from just school but also from their environment (last I checked I haven’t seen a basketball phase through a wall).
While of course if you use it long enough it becomes more and more intuitive, but it’s not on the same level as classical physics (you don’t really “see” quantum phenomena every day the same way you do classical physics).
The third issue is that it’s simply a lot more complex than classical physics. Looking at objects at a quantum physics level permits significantly more precise results, at the cost of complexity.
If you are for example building a house, you don’t need to know the quantum properties of the support beams. You mostly wish to know some mechanical properties such as how much force it can support.