Sure, for diseases we know and are actively fighting (how long was it before we got vaccines for COVID?). My point was that for unknown diseases you might be exposed to in the future you are probably (I say probably, because hey let's not kid ourselves we're all mostly speaking out of our a**s here :)) better off if you had been exposed to milder diseases beforehand.
The number of studies suggesting people exposed to other coronaviruses (common cold etc) having possibly more immunity to COVID disagree with you. You seem to be absolutely sure it makes no difference. Care to back that up?
Care to back up your claim with citations? Looking at the comment history its clear you don't understand immunology so i'm not sure you get a free pass on virology.
I freely and humbly admit I'm neither an immunologist nor a virologist. But I doubt neither are you nor the many commenters on here who have strongly held beliefs backed by nothing substantive.