I wouldn’t have gone with that comparison. Though certainly I neither state nor imply that Pope St John XXIII was a cause of the great Catholic exodus of the 1960s, the fact remains that far from people coming ‘back’ to the church due to the supposed ‘welcome’, ‘fresh air’, and ‘new springtime’, people left the church. In droves. And many NOT because ‘their sins were too great to be forgiven’ (surely you aren’t implying that prior to Vatican 2 the Church emphasis was all on Jansenist ‘badness’ and thus driving OUT the poor people who were so sin-conscious, as that was not the case). . .but rather, and again not faulting the Pope or the Church, because along with various other (many) factors including assimilation with ‘regular’ people (i.e. white Protestants), the ‘sexual revolution’, economics, societal ‘loosening’ and the rampant rise of ‘casual everything’, church services and other Catholic practices were seen as ‘non-essential’. Sure, call yourself (generic you) Catholic, take what you like, and leave the rest and bleat, "my conscience’, and you can have it all, why worry about sin, "None of us really HAS ‘full’ knowledge or consent, and ‘grave matter’ doesn’t matter at ALL in our relativistic smugness.’
So, no, peace to Pope St JXXIII but The Church needs (and I’m not saying Pope Francis doesn’t supply it) somebody who will not simply meet, greet, say something sweet, and just hope and pray that ‘nice’ will lead to ‘accept’, but somebody who is willing, like Jesus, to accept (all the time with great faith, hope, and above all true Love) being disliked, reviled, scorned, and even sacrificed, by his own, for THE TRUTH. Because the Truth WILL set people free. It’s being misled by false truth, half-truth, ‘relative truth’, and a false idea that ‘love means never having to say, “Sin no more”’ that has led to the terrible situation today, and only a radical love that is willing to demonstrate loving to the full even when totally misunderstood, and loving ANYWAY, can be enough to let the blind see again and the deaf hear again.