Weird attack. I love the liturgy we use in the LCMS. It is very similar to Catholic in appearance.
For the sake of good order and Biblical remembrance, there is nothing wrong with a traditional / historical structure.
No one is saying that the liturgy saves or is required, but the form of worship is structured and meaningful.
The exact form a church service should take is largely adiaphora, but I’d rather attend a traditional service. Some contemporary services feel disjointed and incomplete, but this is a personal opinion rather than a theological statement.
Yet we are not to steal from God's Word to Israel.
Nor are we to add offices to the NT Church that the Apostles did not.
Nor are we to incorporate syncretic paganism into the Church.