I’m not going to play semantics practicable if fine. And while I check for oncoming traffic when I open my car door, I might miss a bicycle.
I hope you don’t miss a cyclist, because if you do, that cyclist could die. Making a cyclist fall in front of oncoming traffic is no joke. It would of course be awful for the cyclist and their family, but you wouldn’t be so happy about the manslaughter charge either, and you would be completely at fault.
In the Netherlands, people are taught to open their driver-side door with their opposite hand-- so for us, open the driver-side door with our right hand. That forces the driver to turn around and look.