Tinkerbell, you are displaying an astounding amount of ignorance on the subject. Most motorcyclists hold a full car license. They drive cars regularly in addition to riding motorbikes. On the other hand, most car drivers have never been on a bike and have not been trained to ride a bike, yet they feel perfectly well qualified to tell trained, experienced riders how they should ride. "Think Bike" is of course, bollocks, because most car drivers don't understand what it means, but most bike riders can "Think Car" because they drive one regularly.
Yes, there are some pillocks who ride. There are also some pillocks who drive a car too. Should we judge all car drivers because some twenty-something year old idiot has a supped-up corsa with a loud exhaust and thinks he's Hamilton? No. Of course not. That would be ridiculous. So don't judge all bike riders by that measure either.
I am an advanced qualified rider. I ride several hundred miles a week and I also ride for an emergency service (not prepared to specify details on that). I encounter several situations a week where if I didn't take evasive action, a driver would have me off the bike. Please note that for the emergency work, I ride a fully liveried hi-vis bike in addition to the hi-vis I'm wearing etc. Still people pull out. Only a couple of days ago, a woman drifted across two lanes in front of me, I had to take evasive action and she still didn't see me. I personally know four advanced qualified, very skilled, very responsible and very experienced riders (some of whom work for the same emergency service and were killed whilst riding a hi-vis liveried bike and whilst on an active call-out) who died in the last year as a result of collisions with cars. In every case it was the car driver's fault. How many car drivers do you think I know who died in the same time period as a result of collisions caused by a motorcyclist?
And in answer to your question, Are motorcyclists continually told to watch out for cars ? - it's a fundamental part of training from CBT onwards. Those who don't look out for cars tend to die young. A small prang in a car could be hospitalization or death to a rider. However, there have been many adverts telling bikers to look out for cars. These are usually circulated within the biking community though (which is quite small), rather than being on main-stream tv. There is also a huge push to encourage bikers to take advanced training. Have you ever considered doing any in your car, if you are so intolerant of more vulnerable road users?