I read the article and it clearly presents this whole idea of “must” as coming from one nun, Sister Lucia.
If you have any kind of Catholic knowledge at all, then you know that one nun (or one priest, if he isn’t the Pope or your diocesan Bishop) doesn’t dictate “musts” for the Church. An article running in National Catholic Register is presumably going to be reaching an audience of Catholics with enough interest and knowledge of the Church to know/ understand this. (We’ll set aside the fact that a lot of said audience doesn’t have the same hangups about Fatima or the rosary that some of the folks posting in this thread seem to have, and yes it seems like “hostility” to me also.)
There are articles every week where some priest is saying “this or that practice is important to living a Catholic life” and not everybody rushes to do it or even gets excited about its being said. This is no different. In any event, praying the Rosary and having a devotion to the Immaculate Heart are not bad, harmful or controversial things to do. If you don’t want to do it, then feel free to go read some Scripture or do something else, and stop worrying about other people possibly being somehow “influenced” to do something that is not harmful and might even be helpful to them, even if you don’t like it for yourself.