Trying not to stir things here, or play devil's advocate, just looking to be educated; I also don't have a clue when it comes to bikes.
But why is it that they drive differently to cars?
Is it because they need to take different lines etc. to cars?
An example would be that they tend to ride in awkward places to spot - e.g. from my experience they ride in the centre of the road on the white line rather than in the centre of their lane which, depending upon distance, places them directly in your blind spot.
I know that man-hole covers and grates need to be avoided (especially in the wet) but this cannot explain it?
Another thing that I do not understand is why, just because they are able to do so, do they squeeze through gaps in between and around traffic, rather than just riding centrally in their lane and waiting in traffic?
I certainly don't begrudge them doing so, and try my best to accommodate them. It just seems they do so only because they
can - e.g. In a car, you
can mount kerbs/drive on the wrong side just to get round a que of traffic, but it's certainly not acceptable.
On another note, I definitely agree that more focus/emphasis should be placed on bikes when learning to drive
