To be fair, I based my comments about side impacts on a limited dataset of personal experience that included a slow speed older car and several high speed impacts. They didn't turn out well.
Also, I am a cyclist, including road biking. I try to be cautious, visible, and choose my routes carefully specially around sunrise and sunset when visibility can be difficult. At intersections, I'm especially vigilant and take special care to make eye contact with car drivers, though I've had them make eye contact and look right through me, so it is not a cure-all.
One big difference between bicycles and motorcycles, though, is speed. Typically on a bicycle I am going less than 20mph. Rarely I'll be between 20 and 25mph on the flat with a tailwind, but going faster only downhill. If I'm going 15-20 mph and I T-bone a car that pulls out in front of me, I maybe break something. It a motorcyclist is going 45-55mph, the consequences are much more severe. So, yes to bicycles and be super careful, but no to motorcycles, at least for me.
Finally, a funny story. While in the fire department, I responded to a local MVA. Two cars, partial offset frontal collision, probably 25mph or so at impact, maybe less. The smaller of the two cars was pretty trashed - lots of body damage, airbags blown, glass broken, etc. - and the driver was shaken up but not injured and was going to walk away from it. The lady was complaining about her totaled car, "They just don't make them like they used to..." We responded, "Lady, if they made them like they used to, you'd be dead!"