I don’t believe any sustainable course of action will reduce deaths from the virus unless a cure or a vaccine are found.
The best "cure" is not to get it in the first place, and not to spread it to others if there might be the slightest chance that you have it (i.e. having symptoms or contact with someone who develops symptoms).
There are reports that Covid-19 can cause lasting lung damage even in healthy patients. In the US, there were early reports that most of those admitted to hospital were younger people, and in the same week, Italy also reported an increase in younger people who had experienced only mild symptoms initially.
Circa 20% of infected people will go on to become critical / severe cases. And a report in Guardian today suggested that approx. 50% of those who end up in ICU are dying.
By quarantining we are all stopping the virus from spreading and infecting everyone. If we didn't and everyone DID become infected we would see a massive loss of life. If someone is more occupied with their first world problems, consider what it might feel like to lose a loved one prematurely because that would become a reality for a great many people.
Also, even you don't get infected with this disease, the burden on the health service could end up resulting in loss of life indirectly as well - such as a road accident victim who cannot be admitted because all ICU beds are full. The Tories have dismantled our health service over ten years, we are in a worse position than Italy, Germany and Spain.
To the OP - This is a once in a lifetime crisis, and such crises will test our mental health. But if you don't regard this crisis as being serious enough for you to follow social distancing protocols, then you must not yet have a grasp of the problem we are facing. Ironically, it will be the actions of those who flout the rules that will keep this lockdown in place for longer, as they will keep spreading the virus.
Frankly, I think the Government should have followed the same process as South Korea (lots of testing, tracing and immediate isolation of those infected). In the early days, it seemed to be going down this route by setting up testing points, but dark forces in Downing Street have put on us on a different path.