A lot of people, those around me included, seem to not grasp that for safe overtake of a bicycle you still require a second lane (at least partially) besides your own.

But in traffic and the laws lane usage is binary. There is no such thing as half lanes, you cannot use the second lane "a little". You either need it, or you don't.

So overtaking a bicycle, a motorbike, a pedestrian on the road or a tractor, etc. it is all the same.

What I'm trying to say is, where I live people forget that all the time, and then they think they can "squeeze by", endangering cyclists, motorcyclists and most of all the opposing traffic. I see this multiple times a week in the summer.