You're essentially trying to tank your immune system by doing this. Unless you're especially in danger from Covid (maybe like the professor in this video) you shouldn't avoid training your immune system by exposing it to the outside world unless you want to get very sick when the virus finally does find you.

Obviously it should be done within reason, please don't swim in radioactive waste.

if anything I already went through COVID and my immune system easily beat it because I took care of it all these years by eating healthy food, sleeping well, exercising a lot, etc.. but I don't want to expose it to the virus just because it can beat it again. enough is enough.

The parent has a good point that it may not be an optimal strategy the avoid all contact. This is because - so long as it is not overwhelmed - your immune system is strengthened and immunity boosted by contact with pathogens. If you already have immunity provided by a prior infection or vaccination and you are otherwise healthy, then it may make sense to maintain that immunity by continued contact with the virus.

For many/most others, they're saying enough is enough regarding mandates.