While speed is quite often a contributor, this is why I don't subscribe to the speed kills BS used to justify speed limits, cameras, and influence prosecutions above all else. It allows the morons that, don't look, don't care, looked but didn't see, looked but pulled out anyway etc etc to get away with it. By far a bigger crime IMO. As speed takes a distant back seat to luck in such instances wear the driver didn't look and ANYTHING could be approaching. Just in the case its a speeding biker.
Usually, speed is indeed a factor, but usually it's not the only factor. The fact there is a speed limit, the fact that its your right of way, the fact there is a zebra crossing that requires traffic to stop, does not mean we are immune and counts for nothing....if your dead.
None of that implies there shouldn't be speed limits, or that they are for no reason of course. Driving to conditions is far more important IMO. Rightly or wrongly. That can mean driving faster AND slower than any limit for quite legitimate reasons.
Let's see if my opinion changes after my speed awareness course.

for 35 in a 30 I might add.