Sure - and I know lots of children and elderly people who go twice a month, and even more, voluntarily.
But there are also those who literally can’t think of any sins to confess - and not because they don’t know how to do a proper Examen.
I’m definitely not including myself in that, by the way - I have valid matter for the Sacrament every single week - but there do exist those few who actually don’t - who have already attained to (or who haven’t left behind their original baptismal graces yet) the kind of holiness that we are all expected to achieve while here on this earth. For them, once a year is plenty.
The exact same is true for Confession. Like any other Sacrament, there is a fortifying Grace.
Of course - but in the case of Confession, the valid matter of the Sacrament is a venial or mortal sin committed by the person making the Confession. One may repeat a sin that has been confessed before, but it is dangerous to the soul to do so too many times, and most Confessors won’t allow repetition of sins more than once or twice.
Not only are sins forgiven in Confession, but the soul is strenghend and fed. That is why Pope John Paul II recieved this Sacrament weekly. Did he NEED too? Not in the sense that his soul was in mortal sin, but did he need the Grace of the Sacrament to advance in Holiness. Certainly!
As do we all.
The Pope, holy though he is, is in the world, and has many opportunities for venial sins.
There are so many little children and elderly who simply have no inclination or even any opportunity to offend anyone, even by accident.
Again, I’m not talking about myself.