From a typical Protestant’s perspective, Catholicism is replete with rules and regulations, such as dietary laws at certain times of the year (Lent), days of obligation, can’t eat anything in the time leading up to Mass, mortal sin if you miss Mass without a good excuse — the list goes on and on from a Protestant point of view — because most don’t have anywhere close to as many rules. That’s why Catholicism may appear to be like the religion of the Pharisees to some.
With that said, one could also turn the tables and say that most Protestants have a lack of rules that produces a helter-skelter “anything goes” lack of discipline.
The more I am exposed to Catholicism, I’ve gone from the former point of view to viewing the Catholic rules and regulations more as guide rails and reminders to keep people on track in their faith.