The book is filled with such minutiae on how to celebrate the Mass, the Divine Office and how to decorate the church, etc. This book is living proof of why reform was needed.
When something is important to people, a good many show their devotion by getting particular about it. Among those who are particular, some get obsessively particular. That’s the nature of how human beings relate to something very important.
If nobody is getting obsessive about reverence, that’s probably not a good sign, either. Such concern that everybody act just so can be a huge pain to deal with, I’m not defending it, but it does show that the general attitude of caring among the faithful has reached those who are prone to getting obsessive.
IMHO, though, is all a matter of degree. The same attention to detail that can come from a free-floating anxiety or fear of making mistakes can also come from joyful devotion.
Latin is a true joy to many of the faithful, so I’m not at all surprised that there is a great devotion to it. When something moves your heart, of course you want to share it! Latin is among the riches of the Church and it belongs to our patrimony. It ought to be preserved and promoted, not neglected or disdained.
Latin should not be treated as if it is the only mark of true devotion to the Lord, or to the Eucharist, or to the Church. It does not deserve that place, and giving it that place leaves those who know Latin vulnerable to spiritual pride and to sowing discord over something that by right ought to be a source of unity. Unity is not something that can be forced. It is something that people need to be lead to seek freely. I think those who love Latin ought to see leading other people as the route to spreading appreciation for it. Forcing it on people can lead to resentment that can prove difficult to wash away later. I don’t think that anything that could be called “ranting” is the way to spread a love of Latin. Instead, it reinforces the impression that people who love Latin are a bit more obsessive than is good for anybody.