Here a recent extensive study (open access data)Excess death is statistically significant in many countries. That's albeit the measures that were taken. Did you look for evidence of excess death? if so, when? The data and analysis lags.
I read of instances of families that lost more than 3 members due to Covid; I should yet to check what are the statics of this happen in flu. Covid is different from flu, it spreads faster and might cause different symptoms (though indeed many symptoms are similar). However there is very high variability in the symptoms of one who contracts the virus; many people are asymptomatic, others suffer much. This characteristics, I think, causes opposing attitudes from people who judge based on their relatives experiences. I also view this as failure for science that after one year can't say who will suffer from the virus.
Having said that, It should be clarified that the question of what measure, if any, should be taken (not necessary by the gov, but even by the individual himself) is a different and complex question.
And here, if based of his genuine understanding and based on the blurred/conflicting data he was reading, one thinks that mask should be worn in prayer in public in order to keep the community safer according to his opinion, I find no problem with that.