I can't pass it onto someone unless they allow me to pass it on to them. If you are so concerned, you stay at home, quit your job, wash your hands, disinfect your shopping and dive into the road when a person comes near you. It takes 2 to spread a virus.
I think one of the reasons the govt feared a natural peak is that it would become every one for selves. Quitting their job is exactly what many medical, teaching, vital utility supplies staff etc would do, or rather just not going in. I don't think many people would be go in during the peak. Which would in itself drag it out. Obviously retail, entertainment etc would have fallen much earlier. It was already beginning to fall and close down at before lockdown, and that was nothing like we would have seen closer to a natural peak.
Even now, if infections can be kept lower using various measures while being somewhat 'normal', no one can choose to withdraw themselves entirely from the risk. If you need urgent medical care you would probably venture out and a higher level of infection means fewer medical services available, and a higher risk of catching the virus while you access the limited resources.
Re asymptomatic cases, a recent study in annals of internal medicine suggested that among one dataset...I think it was prison population but struggling to find right link atm, the number who were asymptomatic was about 95%! In others much lower, I think it averaged out about 40% iirc. More worryingly though of the 94% who'd experienced no symptoms, 54% had suffered lung damage.