Aside from the fact that even cloth masks reduce COVID transmission risk by 500% - 9,900% (see link)
in indoor settings and when necessary "Lockdowns" definitely inhibit the spread of airborne pathogens like COVID, how do you arrive at the conclusion such measures are "ineffective"?
I may be wrong on this, but I think I heard you say you have gotten vaccinated...if so, then you sense the danger of getting infected with COVID, then why is the effort to save hundreds of thousands, if not millions, of lives "more harm than good"?