If you refuse to participate in the track and trace then you are basically sticking two fingers up to every clinically vulnerable person and health care worker out there.
Not just them - everybody.
There's a popular misconception that the only relevant risk to an individual is their personal risk of dying of covid-19, so if that's low they could sail through a pandemic unaffected regardless of how many people around them are ill.
In fact, if the illness is spreading widely, even if this is only amongst less vulnerable people, all sorts of things will go wrong that affect everyone. Non-covid medical treatment will be affected, people won't spend money, businesses will go bust, sickness will disrupt all sort of businesses, services and education.
Normal life will be just as badly screwed up by the disease spreading freely among healthy people, as it has been by a temporary lockdown. It will be worse than if we'd never had it, but we'll have the effects of the lockdown on top of that.
It is not just about individual risk of dying.
For anyone who thinks they don't personally have to bother doing anything - actually, whether your risk of being infectious is picked up via an app or via a phone call, it's really important for your own personal future that you do your bit and self-isolate.
Everyone's normal life depends on their local area having fewer infections every week. Acting as if infections amongst low-risk people are fine will achieve the opposite of that.