What happens if a car is coming the opposite way? I guess they will pull in and knock me off rather than crash their car
Yep. I've seen it happen: a Motor Parts Direct van, overtaking on a blind right-hander, met an oncoming car, so rather than stop and/or pull in behind, they sped up, pulled in and forced a rider in front of me to crash into the verge.
And if a motorist coming the other way is overtaking blind on a bend you're rounding, they'll stay out and crash head-on into you rather than what they're overtaking, unless you leave the road - which has happened to me, putting me in a hedge.
Always think about your escape route on blind bends, even if no motorist is visible. Spot the softest spot to ride onto/into and where you'd jump from the bike. It sucks that it's useful to do that.