Of course it also takes time for people to be lured into falsity. The last fifty plus years has proved that. From a homogenous group of believers in the 1950s the Church has not only been drasticallly reduced in numbers but also reduced to a squabbling mass of individuals many of whom reject its teaching and even deny the authority to teach which was bequeathed to it by Christ, Our Lord, Himself.
You only have to read the articles and the comments on this website to be aware of the total disparity of belief among people who claim to be Catholic.
The grace to convert every sinner comes not from receiving Communion but from repentance and a purpose of amendment made in the Sacrament of Penance. The Eucharist is only medicine for those who have taken the cure, not for those who blithely continue in sin.
The differentiation between subjective and objective responsibility disappears altogether when the law of God is clearly explained by one's confessor or spiritual advisor.